Its not advised to install steam os on non steamdeck devices. Pop os, nobara and Garuda I believe come configured for gaming out of the box and are pretty uptodate.
I cant abandon KDE because I like it way to much. I have a powerful computer and I feel like linux is to optimized. Sometimes I just want programs to use as much resources as they need to run perfectly.
I think once I move over to wayland I will feel that snappiness.