>>93294731...what character development?
In Man of Steel he only steps up to the plate because an alien invasion forces him to, and after that he can't go back into hiding again because people know he exists now.
In BvS, he is just sort of following along from stupid plot twist to stupid plot twist, occasionally saving people like its the most tedious fucking job anyone has ever been forced to do. In MoS Clarke saves people because he can't stop himself, but at least he seemed dedicated to it. In BvS, literally every fucking scene of him doing superhero stuff he has a face that says "Fuck, why am I even here?"
In the end, he kills himself to satisfy the martyr complex that he been drilled into his head for two movies.
That isn't character development. How does he grow? How does his viewpoint change? What does he learn? What important choices does he make? What does he WANT, and why?
Snyder's superman is painted so broadly that every one of those questions has, at best, an answer that's just a plot mandate rather than any aspect of the character within that plot.