May I just say something?
ENDGAME WAS TOTAL BS.
They contradicted themselves and proved themselves wrong- MULTIPLE TIMES.
Allow me to explain.
Remember this scene?? Cause I do.
In the scene the ancient one tells Bruce that if a stone is taken out a new timeline branch opens.
To show this, she makes that timeline representation showing all timelines are identical, right? She shows us that if something happens in one timeline because of an inside force (an event cause by something from one of any of the identical dimensions) it will happen in all because they are all the same timeline, right?
Well, if the avengers travel back in time to this dimension, the avengers in this dimension will travel back to another.
If the avengers do something, the avengers from the other dimensions will have done it too, which means that unless they cause a time loop, then it would have already happened in the original dimension.
So the only way to open up an alternate timeline according to the CANNON logic is from an outside force, you know, one that’s not from one of the, forgive the repetition, identical dimensions.
Thank you for coming to my ted talk.