HE JUST FOUND OUT THAT HIS LOVE OF HIS LIFE (GAMORA) DIED AND THANOS WAS THE ONE WHO DID IT; IT WAS STAR-LORDS FAULT IN INFINITY WAR; NEBULA COULD'VE EASLY KNOCK HIM OUT; YOU WOULD'VE DONE THE SAME THING IF YOU WERE IN HIS SHOES OR PLACE; THERE WAS ONLY ONE TIMELINE IN WHICH THEY DEFEAT THANOS AND DOCTOR STRANGE SAID THAT IT WAS THE ONLY WAY; DOCTOR STRANGE COULD'VE REWIND TIME OR TRAP STAR-LORD IN A PORTAL; IF STAR-LORD HADN'T PUNCH THANOS WE WOULDN'T GOT ANOTHER AVENGERS MOVIE (ENDGAME) WHICH WAS A REALLY GOOD MOVIE