What software have you found particularly frustrating or difficult to configure on Linux?
Try Nobara. It’s based on Fedora but it’s got a whole bunch of gaming-related patches including all of the required additions for out-of-the-box HDR support.
As this is for a HTPC, I would rather go for uBlue Bazzite instead of Nobara. Same Fedora base, super gaming oriented too, but atomic/immutable so 0 maintenance.
Plus, uBlue projects are not distros but an alternative build pipeline system for Fedora Atomic projects. That means that the projects scope is tiny and much easier to maintain, and that the real distro maintainers are still the Fedora team. From a user perspective, it’s much better in the long term than a single-person effort like Nobara.
From the little research I’ve done, I don’t think that I want an immutable OS. Sure, I only want to use it as a HTPC today, but what about tomorrow when I find some obscure thing I need to do that requires me to change some things?