Non Sense time travel

Rating: 1/10 (11 August 2019)

In the movie they say that the time travel will not affect the past?! How is that possible?
Thor even stole the hammer from his past!!!
He left him without a hammer!!!!
Hulk basically he didn't have any fight! He did not even got revenge from the last time he fought with thanos.
Captain Marvel could just have killed the Thanos without the stones all by herself!