The bad: The Iron Man movies were horrible and Robert Downey Jr is uncharismatic and self centered, and that isn't charming or helpful in the least bit. Also, Civil War was laughably bad and had such a simple plot. All of the superheroes' points of view and motivations were shallow, and could have been interchangeable in any direction because the conflict was so thin. Guardians of the Galaxy 2 was such a letdown compared to the original. Gotg2 wasn't funny, and I felt myself sighing throughout it.
Good: Guardians of the Galaxy was very charming, and spent the time and effort to develop the characters and make me care about them. Definitely my favorite MCU film. Spiderman Homecoming was my favorite Spiderman by far. Peter and Ned's relationship was believable and MJ in that and Far From Home was complicated. Michael Keaton was one of the best villains in these movies because he did horrible things, but you felt for him on a level. Also Infinity War was much more emotional that I would have expected; there was a fair amount of crying in the theater during the 4 times I saw it.