It really depends on your end goal I would say.
With a “bare” arch install you will probably learn the most (possibly the hard way). Also, arch being a rolling release, be prepared to update your system a lot, and fix problems as you go. That being said, I’ve been using the same arch install for a few years now and have had to fix stuff only once (Nvidia drivers, the usual culprit). If you want to try bleeding edge stuff, that would probably be the best option.
Nixos : same as you, tried, and left because the community couldn’t settle, and seemed to be fragmenting more and more. Also cool for bleeding edge stuff (thanks to the easy rollback)
You could also go for a debian based distro (debian or Ubuntu). My servers run on this, simply because they tend to require less maintenance.
There are also quite a few “docker-centric” distros, that can also be an option.
Whichever option you choose, if you use a lot of containers, mane sure to use something like docker compose, and keep your compose files safely somewhere (a git repository, a backup’d nas, …). You will keep a lot of nixos’s workflow goodness (everything is a config file), without some of the trouble.

















Clean the printing surface with dish soap and tepid water, and adjust your z offset. It appears to be too low from what I can see, but it’s hard to tell from a few pictures. It’s not supposed to be 0, and will depend on your specific printer, extruder, … You should aim to have fully filled squares, with no apparent “scars” on the surface left by the hotend moves. A nice rule of thumb is to be able to barely move a sheet of paper between your plate and the hotend freely without feeling friction (make sure to clean the tip of the hotend before). If after these steps it still produces these results, maybe there is an issue with you bed planarity, but most likely your pla has gone bad (I’ve even seen sealed bags go bad over a few years), try with a freshly dried filament, or a new roll from a reputable source