Minecraft Crashing at Red loading screen after new update (1.16.2)

I was unable to play online as my client was outdated so I installed the new update. However, now it's caused my game to be unplayable as I can't even reach the main menu. It has the red loading screen for about 7 seconds before closing and I've tried to fix it and I can't. I've uninstalled and reinstalled and it's not working.