I think Marvel movies have taken a dive with the MCU actually, because superheroes are interesting when the story can concentrate solely on them and their stories. By throwing a whole group into the pot and just keep adding more and more characters, the quality suffers I feel and the last great Marvel movie was probably the first Iron Man in my opinion. There was a little MCU in there which could have been taken out, but it wasn't much.
I find the oversaturation of the MCU and DCU offputting. For example I think it's a real shame that Man of Steel 2 couldn't have been made before the Justice League story kicked in. There you had a good new Superman in Henry Cavill who couldn't bed in properly before being swamped by the rest of the merchandising machine.
I was repelled by the direction of X-Men after First Class for similar reasons and I was pleased to hear that Matthew Vaughn didn't think that Days of Future Past would have been his idea for the sequel, had he been making it. He did, however suggest it could have been the third one.