I've been experimenting with linux-tkg-bore and https://liquorix.net/ and have found results to potentially be better so far.
I came across XanMod when I was trying to find a Linux fork that included the "PCIe ACS Override" patch for my personal Linux machine, specifically to passthrough a second GPU on my work related Windows VM. At the time, I also had microstuttering issues when playing Overwatch with Proton and it really sucked since I easily get motion sick. It was hard to play my favorite hero (Echo ^^) whilst also being on Linux. After installing XanMod, those microstuttering issues went away and it blew my mind. I've been able to have so much fun again.