I agree. Whenever I use Arch or Arch-based distros they are always very unstable. That is fine if you like a learning curve, but if you don't (like OP) then they probably aren't for you.
I'd say Fedora KDE. It just works, the docs are good, it has a big community and large enough repos. You may have to install proprietary codecs though.
Alpine Linux. It's pretty lightweight (uses ~250MiB on idle with sway), is easy to install and is super stable.
My only criticism is that there is quite a lot of software not available in the repos, but this is mainly fixed by flatpaks.
Fedora KDE. It's easy to setup, modern, customizable and fast. Only issue is that it doesn't come with proprietary codecs, so that could be a problem.
Second would be Mint, it's only flaws is that it ships an older kernel (might be a pain) and uses X11 (insecure).