Hah. Nope.
Man, I would look like much less of a hater if people didn't keep making demonstrably incorrect claims.
No, installing Nvidia drivers wasn't a one line affair for me last time I tried (which was just this year, btw), and even after I got things set up it was a toss-up whether features would work, work but perform horribly or not be available at all. That includes HDR, VRR, DLSS, DLSS transformer model, DLSS frame gen and Ray Reconstruction. On Windows some of the newer versions of those can be a hassle to set up in old games and necessitate forcing in dlls using third party applications, but at least official support works reliably.
Some distros do come with Nvidia drivers prepackaged and that's fine, but all the feature issues remain. If you want a gaming-first distro there still isn't semi-decent game mode support for SteamOS or Bazzite.
Intel GPU support is slightly better but a bit short of hassle-free. You probably don't have an Intel GPU anyway, so we can let that one pass.
HDR support in applications is still sub par. That includes gaming and is true regardless of GPU brand, as far as I can tell.
Anticheat support is still poor and it still prevents many very popular games from running. At this point nobody has anything close to a solution to this, even conceptually. Yes, some anticheat providers have some degree of Linux support, but there is nothing close to kernel-level anticheat from Windows. Yes, this is a genuine problem.
Performance is... trading blows, I'd say. In some games you can get much better frame pacing and better overall performance. In others, particularly when using newer functionality it can go the exact opposite way. This is very situational. If you want cutting edge stuff and paid to get the hardware to run it, Linux is probably not for you. Salvaging weaker or aging hardware for older games is a better use case.
Gaming on Linux is much better than it was and it likely will keep getting better. That's good news in itself, getting hyperbolic just triggers flamewars and negativity on something that should be a pretty clean net positive. It really doesn't help.