For me it’s a combination of Mozilla making strange business decisions (removing of the “we never sell your data” policy) and the fact that a lot of websites take forever to load on Firefox.
I’ve tried forks, LibreWolf pisses me off. Too many settings to change just to still have a broken browsing experience in the sake of privacy. If I need that level of privacy, I’ll use I2P/Tor.
I hate the fact that chromium has won, but it’s getting difficult to avoid the fact that web developers don’t give a rats ass if the website doesn’t work well on Firefox.
Brave was my primary for a while, but I switched to Vivaldi after reading about some of the BAT bait and switch.
I’ve tried nobara and I do like it. However for a beginner to Linux, I’d recommend popos or Linux mint.
I feel like a lot of the more gaming oriented distros tend to be less stable and can present obstacles later down the line. Just my personal experience.