Posts like these make me hope they never, ever add a surrender mechanic, and it’s nice to know they probably won’t for matchmaking (based on dota at least).
This game has massive comeback potential. A team can be completely dominating the entire match, take one bad teamfight, and lose in one push pretty easily.
Are you passing through a GPU? If so, are you sure the proxmox host isn’t using it?
Edit: Just saw the link in the post was to a GPU passthrough guide, so better question, do you see the GPU from within the VM?
I’ve admittedly never tried gaming on a linux VM or LXC in proxmox, but I’ve done other tasks that required GPU hardware acceleration with no issues with both.