It sounds like the error you’re seeing is from attempting to restore the root subvol (@) while the booted into the system
To fix you’ll want to:
- boot from live usb (arch or cacyos).
- mount btrfs partition and access your snapshots.
- Restore root subvol from live environment
If you are still having issues you may need to chroot into the root partition and do an update to ensure your system images match what your bootloader is expecting.
I sent you a DM to test DMs in the instance. I think it went through ok. As far as deleting goes, i don’t see a way to delete in voyager so I’m not sure on that part.
It’s a shame that the fediverse doesn’t have a better way to stop these mass DMs though