If you can install another driver onto the computer, you can put Linux on that and kept the windows OS still, in case you need it. This is dual booting. You chose which OS you want when booting up.

It may be more Nvidia related since the game runs fine with my set up, but I am on AMD hardware. So not too sure how to advise.

I was using Proton hotfix for a while and that got the game to run. I know a more recently version of proton has fixes for MH Wild. Hopefully this new update fixed your issues.

Is OpenSuse tumbleweed worth checking out? Something fairly stable and good for gaming.

I have been using Pop-OS for the longest but recently got newer hardware and therefore waiting for the new version to get more stable. Using bazzite meanwhile. Immutable distro is interesting but not sure if I like it.