I just went to repurpose some old hardware for my nephew (4790k + 32gb ddr3 + rtx 3050) which I thought would make a very passable bazzite box. I put 2 drives in the test rig, one with bazzite Nvidia + kde and one with win11 running with the rufus tpm bypass hacks.
CS2 ran at ~40fps in bazzite with no sound once you got in game, win11 ran at ~100
Helldivers2 ran at ~50fps in bazzite with constant frame drops even after letting it precompile shaders. On windows it was a very playable 70fps.
I mainline Linux myself and I wanted bazzite to be the set-and-forget answer but it really wasn't. I can't in good faith hand that build over to an 12 year old with bazzite and that was super disappointing.