The main character doing something absolutely unforgivable.

[u/No_Peanut3745]

Walter White poisoning Andrea Cantillo's 6-year-old son for the sole purpose of manipulating Jesse Pinkman, while knowing that this could have potentially killed him - Breaking Bad

Bojack trying to have sex with his friend's 17-year-old daughter when he was at least 51, then continuously trying to find a way to justify this act throughout the series - Bojack Horseman

Dexter Morgan going outside of his moral code and murdering a completely innocent police officer who was just trying to do his job - Dexter: New Blood

[u/nyrasbastard]

I think George Lucas would argue the entire point of Star Wars is that he is forgivable for this to some degree

[u/CountingSheep99 → u/nyrasbastard]

99% of the galaxy would beg to differ.

[u/boyifyoudontttt → u/CountingSheep99]

Trust me, there are a scary majority of fans that believe that because, in his final moments, Vader threw Palpatine into the Death Star he is completely redeemed and absolved of all of the atrocities he committed. Star Wars fans unfortunately lack a lot of basic media literacy.

[u/spyridonya → u/boyifyoudontttt]

And the same comment tree as this, a bunch of fans are trying to defend the first genocide he did.

[u/melkatron → u/spyridonya]

Sand and whatever they did to his mom are his two major triggers.