People should find a better foundation for self-esteem than hating linux distros. They’re mostly ok, and without debian Linux wouldn’t be what it is today
Preferring a certain distro is fine but why care if others like something else?
Or run the raid 5 or 6 separately, with hardware raid or mdadm
Even for simple mirroring there’s an argument to be made for running it separately from btrfs using mdadm. You do lose the benefit of btrfs being able to automatically pick the valid copy on localised corruption, but the admin tools are easier to use and more proven in a case of full disk failure, and if you run an encrypted block device you need to encrypt half as much stuff.
You get pretty far with just clone, pull, add, commit, push
What don’t you like about it?