VAC bans are only for cheating in games, you shouldn’t get one. Can’t say the same about getting your account locked though, but Valve usually doesn’t do stuff like that

I’m playing Barotrauma and Lethal Company lately. Both very fun coop games. We need more coop games, I don’t know why devs don’t make them as much anymore

Check out falling lightblocks. I’m not sure if it’s on iPhone but on Android you have to get it from their website because Google removed it from the playstore because they got copyright claimed

It should support DLSS unless you have an older video card, which the drivers don’t work well with. I heard the newer Nvidia cards work better though. Of course, is all up to you whether you like it or not, so just try out Linux and see. If you don’t like it just reinstall Windows. Make a recovery Windows USB beforehand though, makes it easier to reinstall.