Marvel movie is always a derogatory term, there's no other way around them. People hate them, because they're good. They especially hate the Guardians of the Galaxy ones, because they're better. It's life.
I dont like them. I think they are bad. Superheroes movies CAN be good, well written, with some depth etc.. I dont think Marvel movies are like that. Maybe because they need to rush to release so many of them. But most people like it, good for them.
Btw, guardians of the galaxy is one of the few that I really like from Marvel.