A big part of learning Linux is screwing up computers and starting over.

Two. The first time I had nvidia related issues with nobara, so I removed nvidia drivers for reinstallation... And couldn't figure out how to get them back. The second time I had used mint for long enough that I felt confident enough to nuke windows partition. I used gparted and nuked the whole disk instead.

Not counting the times I tried fedora and it killed itself with the first updates and then with multimedia codecs.