>>107366702It also ties in pretty nicely with the shit he's been dealing with over the course of the MCU
He was hated at first as this big unstoppable monster, used as a weapon, and it got to the point where he literally fucked off of earth entirely because he felt that he didn't belong
He ends up on Sakaar, where people like him for being the big dick gladiator. Seeing Natasha in the ship's video made him realize that he can't just abandon his home and the people who counted on him, so he returns to help fight
After the snap, he's moved on and actually found peace with himself, and with that comes the acceptance he's been hoping for the entire time, that by embracing the Hulk rather than tearing himself in half both he and the world around him is happy with who he is. The first third of Endgame was showing how people reacted to the snap. Tony tried to build his life, Clint couldn't let go and became a vigilante, Cap kept trying to help people move on, but Bruce found himself at peace for the first time ever
It's weird how much of a turning point this thing is, but Professor Hulk doing a bad dab while kids laugh is a huge capstone on his entire character arc