

You seem to be reaching for pretty advanced solutions – Docker and HA both require you to read a lot of documentation to get started. Bottles is also a powerful and flexible tool, which is the opposite of simple.
What game are you trying to run? If it’s on Steam it should be a no-brainer, otherwise Lutris can simplify a lot of things.
I doubt you actually need Docker for anything, unless you have a specific use case I would just abandon that. For your lights, I would try searching for “home assistant [model/brand of lights]” and see if you can find a setup that someone else has gotten working that you can mostly copy.
What might have happened: if you select a global compatibility tool (proton) in the steam settings, it will use that for all non-native games. But any games that ship a Linux binary will still use that instead of Proton. This is generally good, but some devs ship a Linux binary that’s actually not as good as the Windows one. I’ve seen some games not update the Linux binary until much later than the Windows one, so the Linux one is out of date, and for some games it’s just flat-out broken. In these cases you can manually select a Proton version for that game, which will force it to run the Windows binary.