Can't uninstall Avira. Deleting folder manually produces BSOD boot loop

The title says it all. Everytime I wanted to uninstall Avira an error message appeared claiming uninstall.dll or something like that was missing. Repairing produced the same error. So I tried to manually delete every Avira folder and everything was well until I uninstalled the Program Files folder which when restarting the PC produced a Blue Screen of Death loop until I either entered Safe Mode and restores the folder or I did a System Restore. I even tried soft reinstalling Windows 11 to no avail. The BSOD claims rtp_process_monitor.sys failed after deleting the Avira Program Files folder. I deleted that .sys file from the system32 folder but then Windows wouldn't even boot and I had to System Restore it again. So I have no way of deleting the Avira folder, the only option I'm left with is a full clean install of Windows, but I really don't want to do that.