FYI, I tried this with tyranny and while it didn't work with steam play (started but super slow and crashed) it did work nearly at native quality using steam it

FYI, I tried this with tyranny and while it didn't work with steam play (started but super slow and crashed) it did work nearly at native quality using steam itself running under wine with play4linux. So with the windows binary for the steam application running under wine, the game worked better than the Linux steam client running wine under the hood. Unclear why, but maybe worth trying both ways if one fails. I also couldn't figure out how to report this, sadly. If it works better in play4linux steam than directly it seems like it should be straightforward to copy some configuration settings to improve things.