>>82290522Eh I understand him better after watching the movie.
He gets dragged on to these fights while he struggles on his existence and awareness. His stake in it was showing Wanda how they can both conquer their doubts/fears, but pretty much Wanda left him and he had more doubts right before the airport fight. He became all the more distracted and confused in the end.
Vision and Wanda start their arc as scared/doubtful individuals regarding their powers. But Vision clearly has an idea on how to regain control (doing what he thinks is right, especially from the POV of the people), while Wanda doesn't have an idea and kind of succumbs to the people's view of her. Vision wants people to see her as how he sees her.
Their arc ends with Wanda resolute that no matter how much she bends for the people, they will keep having fears of her, and instead she now knows that the only fear she needs to control is hers and not the people. This happens shortly before the airport scene. Vision continues to side with Tony in hopes that doing the right thing and showing people he is doing the right thing will be helpful, but he makes a mistake (similar to Wanda at the start). His arc ends with him pondering things.
The sad thing is that Wanda gets support from Cap, Hawk, etc. Vision has no one.
tl;dr: Wanda realizes she just needs to control her own fears, while Vision thought controlling other people's fears of him will help. It's doing things for yourself vs doing things for others.