Extreme lag and crashing on exit game (kindda fixed)

After the patch yesterday the game has kept on hanging and the faster you run (with mount) the longer it hangs and rubberbands you back. And when i try to close the game, it just crashes, instead of closing.
What i have tried: tried to use DDU to uninstall my GPU driver, and reinstall them, this had no effect. Turning off DLSS, change preset, change individual graphic settings. Nothing helps. Atm. the game is not playable for me.
System:
I9 9900k
RTX 3080
32 GB ram
Samsung evo 970 1 TB ssd
Windows 10 Fully updated Drivers also updated.

Update on this one. The latest update for nvidia has f…ed with something, update 555.xx has major performance problems in several games. I reverted back to 552.44, However this alone was not enough to fix the performance issues, I also had to uninstall the game and reinstall it again. This process however fixed the performance problems. I hope this can also solve it for other people that has problems.

Had an issue where the game would hang and sometimes close on it’s own after several minutes, sometimes not. I managed to fix it by running an Integrity Scan on the game install using BNet Client, and it’s been good since.