I traveled through hundreds of worlds at once

If he left now, after Thanos continued to collect six Infinity Stones in this universe and snapped his fingers, he would probably not retire in the back garden like in the movie, but would take the six Infinity Stones to the parallel universe he created, trying to eliminate the cancer of his multiverse.

In order to prevent Thanos from causing trouble for him later, he decided to kill Thanos in this world first, and collect the Infinity Stones in full, so that when he went to the parallel world in the future, someone would use the six Infinity Stones to deal with him.

"You can go back to your own world to get it!" Hearing that Yi Hui actually wanted to take it away from him