Game crashes as soon as I try to start it - 1.16.200

After updating to 1.16.200, the game crashes as soon as I start it. It gets stuck in the pink "Mojang" screen and a second later the window closes automatically and MC crashes.

After completely reinstalling (and deleting all related files) the game was working normally again. Yet, as soon as I copy my backed up MC wolds into the correct folder and restart the game, it crashes again. I tried out copying only specific (newer) worlds and that actually fixed the issue. Still, as soon as I try to play my older and bigger worlds it crashes again. Only solution to prevent the crashes once they occur is to reinstall the game.

I hope this gets fixed asap, really want to be able to play on all of my worlds again