why does everyone hate Marvel now?

wouldn't you go to war whit someone if they took your children.

I gotta stop you right there. Many superhero movies, especially sequels, put emphasis on action set pieces and cramming in as many characters as possible. MCU films manage to do both of these things, but they don’t use CGI blockbuster directors like Michael Bay or Zack Snyder.
They choose smart directors/writers who focus on character and plot, and support them with a CGI crash-course to teach them what they don’t know. It pays off, resulting in a much more sustainable and marketable product with higher average quality than the superhero genre.