The original Doom and Doom II still unironically kick arse. There are updated engines that allow fancy things like looking up and down the the mouse but other than that (and maybe making the graphics prettier) there's very little you could do to improve those games
The thing I like most about Steam is that games under Linux just work, for the most part. I don't play AAA games online multiplayer which is, I believe, where that falls down, but other than that it really is pretty seamless
I've got a few reddit coins from when someone gave me gold. Is there a way I can fuck over reddit or promote the fediverse using them before they time out?
Honestly Linux is no harder to use than Windows nowadays, although it is different in places so there's some "muscle memory" to overcome. I'm the opposite though, I cannot find anything under windows any more without checking in three wrong places first!