Bazzite isn't going to be as flexible as some other distros, but it's goal is to make the Linux transition as easy as possible. It's aimed primarily at gamers but you'll get a full OS that you can do all the normal stuff on
Edit: Not arch but fedora.
It can load into a desktop environment by default and you can install Flatpacks, and it comes setup for gaming out of the box. That's enough for 90% of people.
For some reason the video acceleration in Steam itself will break running games if you alt-tab back and forth. But it can be disabled in the menus, and I haven't missed it at all.
Kubuntu is Debian but i don't think that has caused any issues.
Since i got the deck i don't really use the PC for gaming much though.
This is all purely my anecdotal opinion.