These games are all rated gold or platinum on protondb, indicating that they work perfectly for most people.

Hard to say what might be going wrong for you without more details. I would guess there's something wrong with your video driver. Maybe you have an nvidia card and the OS has installed the nouveau drivers by default? Installing the nvidia first-party drivers (downloaded from the nvidia web site) will fix a lot of things. This is indeed a sore spot for Linux gaming, though to be fair graphics driver problems are not exactly unheard of on Windows either.

Personally I have a bunch of machines dedicated to gaming in my house (https://lanparty.house) which have proven to be much more stable running Linux than they were with Windows. I think this is because the particular NIC in these machines just has terrible Windows drivers, but decent Linux drivers (and I am netbooting, so network driver stability is pretty critical to the whole system).