wHiCh DiStRo ShOuLd I uSe FoR gAmInG??

That is the thing of it. I started with Slackware. Then Debian and moved to ubuntu. I'm still using ubuntu. I've loaded up some other distros but they bring nothing definitive to the table. I've installed pop os and it works. If it had existed when I moved away from slackware I might have picked it. If you are using it and its working for you why bother changing.

I went Ubuntu > Mint > Ubuntu > Pop_os. The only difference I've noticed is Pop breaks less often.

I used Mint for a good long while, but went to Fedora KDE for better Wayland support. KDE is quite different to Cinnamon, not sure I have the words to articulate how. It's fussier. The main difference about Fedora is package management, DNF is slower than APT, a lot less software is packaged as RPMs, and a lot of "we don't package it, you have to compile it" software offers no instructions for Fedora, and trying to translate the Debian/Ubuntu instructions practically always fails because the library they want you to install isn't there. So Fedora is Linux with less software.