Boot from older kernel in the boot menu and check if it works
Run sudo snapper rollback
Reboot
Boom, saved you a reinstall.
Alternatively, you can set up zypper to keep old NVIDIA packages, then just login to a CLI and install the older driver package, then reboot. I did that a few times as well, but the snapper rollback was easier.
X11 is ALSO buggy
I didn’t have any of those issues for the 3-ish years I was on Tumbleweed and NVIDIA. I’m now still on Tumbleweed, but have switched to AMD for proper Wayland support