I recently decided to rewatch all the Marvel movies, because I'm boring, and after Guardians it took a pretty big turn.
Going from the more gritty drama with some funny one liners ever so once in awhile, to let's see how many one liners and nonchalant comedy we can put in.
Then after Endgame they ramped that shit up
Exactly! That's what I saw as well. Like they saw how successful Deadpool was and thought we should do the same, just with less violence and vulgarity, and have them all be that way.