The God of Thunder has been a part of the Avengers franchise for more than a decade now, and Thor could have made several decisions that would have significantly changed the Marvel Cinematic Universe. As an original member of the Avengers, Thor has seen the whole of the Infinity Saga play out. After surviving the events of Avengers: Endgame, he continues to be an integral player in Marvel Studios' Infinity Saga. Looking back at his stint in the MCU, however, Thor could have changed the trajectory of the franchise a few times had he made different choices.

https://screenrant.com/thor-character-important-decisions-change-mcu/