When I try to log in the bar loads then gets to the end then says oops, minecraft has crashed? like wtf?

Put the summary of the bug you're having here

What I expected to happen was...:
Log in so i could play Minecraft with friends!
What actually happened was...:
It loaded up then crashed everytime!
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2.idk???
3.idk???