I am on Garuda Linux running their KDE Dr460nized Gaming Edition. It is based on Arch Linux, btw. Because it is Arch, I only recommend it to moderate to advanced linux users, maybe newbies if they are not the kind to go running to a help forum and post, but instead research and figure things out. With that said, Garuda comes with a handy click/install GUI for many things, but a special section for Gamers that makes installing everything you need easy and simple.

If you are a newbie, I would recommend an Ubuntu distro because it has a HUGE help forum to get your feet wet. In that, I would recommend Drauger OS, it is Ubuntu for Gamers.

Using rolling release distro seems to be great for gaming because you'll get bug fixes, kernel and driver updates faster. Even steam deck is based on a rolling release distro (Arch). On the flip side, you'll also get new bugs before anyone else. Doesn't happen too often but it does happen.

Crystal Linux

www.getcryst.al

I use pop os for gaming without any problems

I use fedora without issue

Seeing as you're coming from Windows and already have familiarity with Ubuntu, I'd say go with Ubuntu. The difference between Windows and Ubuntu is pretty minimal, and Ubuntu has amazing support because of it's popularity finding an answer to any question is a simple search away. The FPS gains from a leaner distro will be minimal compared to Ubuntu and you still get a fully functioning, well maintained and supported system.

I wouldn't recommend you venture too far from Ubuntu but if you're feeling a bit adventurous, Pop!_OS is based on Ubuntu and is a great option. Any of the Debian based distros would also feel similar to Ubuntu and Windows and will generally offer a user experience that a Linux noob should be able to get into as you gradually get used to using the terminal rather than GUIs.

Damn. How embarrassing. I've notified them.