I can agree with the idea that the mcu had an advantage in that, Hulk aside, the marvel heroes from the first few mcu phases were more or less blank slates... that is, moviegoers didn't already have a lot of preconceived notions of what the characters should be like. Batman, Superman, and WW are all well-known enough characters that moviegoers have their own ideas about them which makes any cinematic depiction of them more prone to controversy. But tbh this mainly comes into play with Superman, as Zack's take on the character is much different than how a lot of people view him, both comic fans and folks more casually acquainted with him.