Is Bazzite good for gaming?

You will probably get the best idea about its compatibility and performance through Reddit, gaming articles and YouTube than from over here.

You will only use it as your sole OS on your primary machine if you think 2025 is Year of the Linux Desktop.
 
It's nice if you are more interested in playing single player titles but some multiplayer ones simply won't run due to the kernel based anti cheats they use so you will have to check for compatibility but other than that it offers a console like experience just like steam os and is highly recommended in the linux gaming community. It works the best on AMD gpus but also has beta for Nvidia gpus now, also you can wait for valve to release the current steam os which is even better but only plays the steam launcher I think. You can also look at the LTT video on how to download steam os and its ups and downs.