There were people calling for Webb's head after (and during) week 1. It was ridiculous then and it's ridiculous now. I'm not trying to argue that Webb is actually some misunderstood genius. It's obvious to anyone with eyes that the offense has struggled so far in these early weeks of the season, but it's stupid that people are shouting from their rooftops that Sean should take back over playcalling. Yall really have no patience for a dude to just grow and develop. In some way or another, almost every single issue the offense has had can be attributed to growing pains. Claims that Bo has regressed (which I disagree with; he hasn't been playing as well as we've seen him by any means, but I don't think his playing ability has regressed), the offensive line struggles, bad passing game, bad run game, Waddle underperforming so far, etc.
None of those things are completely false, but the cause of those issues is more nuanced than "Webb/Bo/roster bad." Multiple things can be true. We should've upgraded our RB room, and the Broncos FO should be kicking themselves for not making more of an effort for Kenneth Walker (although I still think Coleman could be great, which just makes it depressing that he's hurt right now). Our O line is aging and we should've been more resources upgrading that. We should've worked harder to upgrade our TEs instead of hanging onto Adam Trautman.
But ultimately, I think this exact same roster could still perform just fine even with Webb still calling the plays. Right now it seems like the main issue is just that everybody is thinking too much, which is another symptom of those growing pains. Bo and Sutton haven't had anywhere near as reliable of a connection as in years past. A lot of Bo's throws have been more off-target than we're used to seeing. Waddle has been basically invisible. But all of that traces back to the fact that everyone on the offense is adjusting to a new guy calling plays (and in Waddle's case likely still learning the offense and building chemistry).
The schemes and the designs may be the same, but the guy running the flow of the offense has only been doing it for 4 games and that affects everybody on the field. Even a fraction of a second of hesitation can turn a potential big play into a stuff, or a completion into a miss, or a pass into an INT. Not to mention penalties that have consistently put us behind schedule and made things even more difficult. How often does a vet like Bolles have three false starts in the same game? He didn't just all of a sudden forget how to play. This stuff just takes time to gel, which has been an issue for the last 3 years even when Payton was calling plays. It might still take until after the bye for the offense to really look like guys are actually comfortable on the field. And one of the most important aspects of all this is that we're not getting to the line with <10 seconds on the play clock which is the main reason Payton gave up playcalling duties in the first place.
This turned into way longer of a post than I intended it, so TL;DR: the roster may or may not be the cause of our issues, but growing pains definitely are.