I agree First Avenger is a bit low. Also Spiderman Homecoming Better Then Avengers 1 and Black Panther. Im not the biggest Fan of The New Spiderman. Maybe its because there have been 3 in such a short time.
Here are my knocks on those films..
Black Panther - the CGI fight at the end between the two Panthers, looked corny and it's the sort of cheap take the mask off time action you'd see in a movie 10 years ago. I also didn't like that Wakanda felt like a single street country, and while the waterfall scene looked good in practice it was just goofy to me. It's also a bad sign with the titular character is maybe the fourth best character in the film.
Captain American The First Avenger, I have to watch it again, I didn't care for the skinny Steve Rogers look and I believe they had pacing issues. I also wish they would have done The Red Skull better.
Spider-man Homecoming, certain things I loved about the film, bank robbers and a year in the life of Peter were great. I dug the Vulture look and Keaton's performance and the film felt like a Stan Lee/Ditko comic or a Bendis/Bagely era.
Avengers, watched it again and forgot how much filler there was in it felt the need to fast forward through bits and pieces.
GOTG, why do I love this movie, I like the CGI. I dig Ronan the Accuser(he's basically ISIS and the film is a metaphor for Iraq). I like the movie is a stand-alone and the distinctive characters. It's also a fun space opera that has a cast of dozens who are introduced given a story arc and a satisfying conclusion.