Yes I also broke lots of distros, (Linux Mint, Kubuntu, KDE Neon, Fedora KDE) and switched away from MXLinux (too old) and Manjaro (bad reputation even though great experience)
You can install packages normally? I think you got something wrong here.
Just do rpm-ostree install app or rpm-ostree install /path/to/app.rpm for local RPMs. Like normal actually.
Yes agree and agree, I broke everything else.
I disagree with Debian. Apt is horrible, updates are bad. Linux Mint is nice, but the Desktop is still X11 which is now basically unmaintained. You will probably get no real support for X11, and I dont know how long it will take the devs to get XFCE / Cinnamon to Wayland.
I mean I literally had an issue with the otherwise great MXLinux, where my Nextcloud simply didnt work, because the client was a vew versions too old.
Debian is all about preinstalling stuff, which is pretty annoying, and thus native packages. Debian with auto updates and only Flatpaks maybe, but like it is, no way.