Not sure why critics are beating up on this movie. I enjoyed it quite a bit. The acting was horrible and it was the same tired Marvel formula, but the setting was a lot of fun, Kang is quickly turning into a strong villain for the franchise, and generally speaking I had a lot of fun with this one.
The MCU has truly sucked lately. While this one wasn't GREAT, it was waaaaay better than the last five or six movies they've put out post-Endgame.