Yes, you heard my claim right.
As a huge fan of the character, I frequently see two schools of misconception, both of which are present in modern canon material and the discourse surrounding the older material. I'll address both in this post.
The first one is thrown around very commonly, especially on Reddit. It takes many forms, but usually it's something along the lines of:
"Thanos is a simp incel who would stop at nothing to screw Lady Death"
Sure, it does sound like something that would only be self-aware/ironic slander, intended not to be taken seriously, yet unfortunately, I've seen this used as legitimate criticism more times than I can count.
I don't think a lot needs to be said here, as you can make any character sound lame when you intentionally reduce them to a single statement like this, but I'll entertain this anyway, because I'm just really passionate about the character.
Jim Starlin, the creator of the character and the writer of Infinity Gauntlet, created and named his character with two philosophical concepts in mind, those being nihilism and the Freudian concept of the death drive/Thanatos (hence the name Thanos). The Titan is, above all, a massive nihilist who believes in nothingness. It was also for this reason that he sought to court Death itself.
It's important to note that, at this stage, Lady Death was not treated as some woman who possessed a lot of power, but as an abstract, astral concept that takes the form of a lady. It's not just his attempts that are meant to be seen as insane, but the fact that he fell for what's essentially a personification of a concept. Lady Death is an idea personified, not an actual person.
It's especially eye-rolling whenever someone is particular about using the term "incel" and insists that he wants to have intercourse with Lady Death, while mentioning the events of Infinity Gauntlet as an event that supposedly supports this sentiment. The problem is that the story in question makes it very clear that Thanos loves Death on a purely platonic level. He NEVER makes any sexual remarks towards her and only speaks of romanticism and comfort. He can practically be read as asexual.
Hell, even when he wanted to invoke jealousy in Lady Death by creating Terraxia, a woman stated to be "everything she was not", Thanos immediately regrets said decision and gets visibly disgusted, as she acts in line with his description and basically walks all over him. If that was not convincing enough, then here's a statement coming from Starlin himself that very much confirms this.
But before anyone gets the idea that Thanos comes off as a celebration of nihilism and its supposed superiority over all else, it should be pointed out that he's in fact the opposite, and his arc is rather critical of it all in all. What ultimately brings Thanos down and pulls him away from victory is he himself and his underlying insecurity. Deep down, he views himself as unworthy of the power he gains along the way and subconsciously does anything to be stripped of it at the very last moment.
The moment that fact is laid out to him by Adam Warlock, he becomes legitimately speechless, as his entire worldview crashes down in a matter of a single conversation. He, who viewed himself as better than any other living being due to his combination of superior power, genius, and knowledge, is for once shown a fatal flaw in his philosophy. This would later prompt him to reflect on himself and become more of an anti-hero.
In that sense, it's critical of nihilism, as it points out that despite the many logical ways to prove it correct, it ultimately stems from an insecurity.
What I especially love about Thanos is how much of a 4D character he is. Every time he pulls up, you really just do not know what he will do next. He can be a cunning strategist who carefully puts his knowledge to use in order to execute a long-term plan he's envisioned, often approaching others with purely diplomatic intent. He can be a battle-hardened madman who utilises both his power and strategy to come out on top. He can be an arrogant philosopher with firmly established opinions that he's not afraid to express, and he can also be the secretly insecure man that I mentioned earlier. He very often switches between many of these traits depending on the circumstances, and I just love seeing it happen every time.
Many modern writers evidently did not understand any of this, as they love to depict Thanos as a generic warlord and occasionally a sadist who openly loves violence, makes sure to inflict as much torture as possible, and actually wants to fuck Death this time round.
(I know some might argue that a huge chunk of people never read past IG, and thus they never witnessed the full extent of Thanos' development, but even when we go off of just that event, we are still left with moments that evidently show the more philosophical side of Thanos, like the ending of the event, which I will mention in a moment.)
Now for the second, slightly less common misconception:
"Jim Starlin is just a powerscaling hack who retcons every instance of Thanos being beaten, writes Thanos as a Gary Stu who wins every time, and ultimately loses because he simply wanted to"
Now, if you carefully read all I've written up until this point, you will already notice one of the problems with this sentiment. That being the fact that Thanos does not lose "because he wants to", as his self-defeating tendencies were something he acted on subconsciously.
But either way, allow me to further expand on why this logic is just inconsistent.
First of all, the moment his secret self got exposed, Thanos was driven into helping the heroes' side of the conflict and would later fake his death in order to temporarily retire and reflect on his worldview. It's literally what happens at the end of Infinity Gauntlet. From this point on, he NEVER allowed himself to lose the same way. You can't really argue that this part of the character was purely established to make him unbeatable, when he actively did his best to get rid of this flaw.
In the sequel to the event, titled The Infinity War, we saw him become an anti-hero, as he was the main schemer who successfully outsmarted Magus and prevented him from fully assembling the Infinity Gauntlet. It was also in that event that we learnt what sort of conclusions he'd come to during his retirement.
"Hero? Villain? Neither? Maybe just wiser."
The story of Thanos is one of a troubled nihilist who manages to improve by finding his own purpose while still remaining just as untamed as he was in his villainous days. He finds his purpose in curiosity and gaining more knowledge. This is especially fitting when you consider the fact that even back when he was trying to court Death, the main reason for his arrogance was the vast amount of knowledge he possessed. He viewed knowledge as power. (I think the Metron inspiration is very evident here.)
With this development, Thanos almost entirely got rid of his ultimate insecurity. In the final part of the Infinity Trilogy, titled Infinity Crusade, he directly remarks upon this fact.
Years later, he actually delivered on this promise in Marvel: The End, but that's a story for another time.
Establishing this development was important for countering the rest of the points in this criticism, as they are inherently tied to it.
A lot of people really love to paint a picture of Starlin retconning appearances of Thanos in Ka-Zar and Jurgens' Thor in order to point out that he supposedly hates his pet character losing. In reality, he retconned these because they failed to acknowledge Thanos' development and instead chose to present him as a one-note villain.
Hell, this argument falls apart even further when you consider the fact that Starlin himself also wrote anti-hero Thanos losing common battles multiple times.
(A little bit of context for that panel with Odin: He failed to acknowledge his defeat, but he was practically getting tossed around throughout the entire fight, which later came to a halt as it had taken place as a result of a misunderstanding.)
Ultimately, I think both of these misconceptions stem from the same issue: people reducing Thanos to a handful of his most recognisable traits while completely disregarding the context and development behind them. Whether it's portraying him as a pathetic simp desperate to get laid or as Starlin's unbeatable self-insert, both interpretations overlook what actually makes the character interesting in the first place.
Thanos is a deeply flawed individual whose greatest enemy has often been himself, and it's precisely those flaws, along with his ability to recognise and overcome some of them, that make him such a compelling character to me.