Probably not a helpful suggestion, but CachyOS might be a better fit for you.

Bazzite is an immutable distribution. This means that most things on the system are static between major Bazzite versions, at which time everything updates at once. This can be great; for someone who doesn't want to tinker, or for someone who's worried about breaking things—it's very hard to break.

On the other hand, it also means that everything is running on an older version, with bugs that have been fixed in newer builds.

CachyOS is Arch-based. You can configure everything in the system, and can update all your packages to the most recent versions as soon as updates are compiled in the CachyOS repo. The CachyOS repos are fairly extensive, but you can also install most other things from the Arch User Repository (AUR). The AUR is a bit of a "Wild West" where packages may not install or work dependably, but in most cases they work great... albeit sometimes with a bit of tinkering required.

Your example of getting a "Deck Verified" game to run is what prompted this for me; CachyOS comes pre-installed with 2 versions of Steam (native and non-native), a bunch of versions of Proton (Valve's stable/experimental, GE, and I think more?), Heroic launcher, and Lutris launcher. So, you have like 8 different configurations to try just from toggling things that are pre-installed, lol. I haven't had a game not work for me yet.

You also mention self hosting; in CachyOS you can install Docker or Podman from the CachyOS repos and then run a Docker image. They almost always "just work" without any tinkering needed, so you can jump right into setting up your configuration/settings. Or, if your prefer a more integrated solution, just about everything will be in the CachyOS repos or the AUR (but expect to put more work into it.)

Bazzite might be holding you back a bit, and it sounds like you might not need the "safety" of an immutable distro, while its limitations might be getting in your way.