Only the Hulk part bothered me.

You're not wrong on everything else, but I didn't mind the rest. Especially the Black Widow stuff. Yeah it's bad that she wasn't acknowledged at the end, but her death worked for the story IMO. It was an intense scene, and I like that in some ways Hawkeye's the emotional core of the group, even though everyone thinks of him as the weakest link of the Avengers.