

Super happy with Bazzite as a gaming PC. I think only a power user might find the “immutableness” of it annoying. You can still install OS packages, it’s just highly discouraged. 90% of the time you’d just be running Flatpaks (a mostly self-contained app that is easy to install and remove). I’m using it with an old-ish NVIDIA card and at first it was troublesome but I think it worked itself out after a few updates. AMD has better compatibility from what I understand.
https://www.system-rescue.org/disk-partitioning/Repairing-a-damaged-Grub/
I would also suggest, if you get grub back, to choose the 2nd kernel version in the list. The latest/top one will probably put you back to your broken state.