I had the same problem with enshrouded, including desktop sluggishness. I “fixed” it by fiddling with detail settings until I found one thing that had a significant performance impact. I want to say it was something to do with shadows? I’ll try to remember to look when I’m at my desk. Hopefully someone has a better answer/suggestion, but something to try.
Also, did vulkan shaders run and complete? Mine don’t on Enshrouded, get stuck at 99%. I know that can have a performance impact.