SO.
I moved all of my partitions a little to the right to expand my EFI partition so I can try installing Hackintosh.
Initially, I had thought gparted nuked my btrfs system, because all it contained was an “@” folder. I didn’t realize it was a folder, I thought it was a file. I figured that out, and it held my ENTIRE filesystem!
Okay, so, I move all of the stuff out of “@” into the filesystem root, so now I could boot the system if I used grub manually. It now works because I made a symlink called @ that points to /, because grub still expects “/@/boot/grub”.
…but is that hacky? This is apparently part of the subvolume thingy. I guess I don’t know the kernel args to fix it if everything were inside of @. I don’t think I plan on using subvolumes, do I guess I don’t care?