Apart from Black Panther (and I only saw 2/3 of that, because my young son was too scared to continue), I haven't watched any of these big Marvel movies. Call me quaint, but I prefer stories that focus on one hero. Too many, and the thread gets lost for me.
I guess it's a bit like the classic war movies where you would switch between different groups. I don't expect everyone to like it. Black Panther is very good.
Good point. I am more forgiving with that kind of movie. (And of course I watch plenty of shows with lots of different protags - GoT, Westworld, etc.) I guess it's just harder for me to get emotionally invested in superheroes.