Comics have very rarely ever translated to film well. As a comic reader I can tell you 95% of what I read is no where near good enough for a movie. Only an exceptionally good story translated exceptionally well with an exceptional director and writer who knows what to cut and change for the big screen can pull it off. It's why only a handful of superhero movies ever are any good.

Bad films do well. Good movies do poorly so box office I think it's a far less reasonable thing to try to understand.