Vision is/was ever evolving. He learned human traits. Humans are weak, he became weak.
Hulk has always been in conflict and half the time a bad guy. Plus, no one knows how to make movies with hulk.
Starks injuries were seemingly forgot in the movie, something that was rare. Just like by the end black panther was essentially useless. And now he is gone. All of this technology in Eritrea and they got destryoed by simple numbers. They daced far more in the original avengers