
I’ve noticed that wine (and proton?) use a vulkan-based system to emulate DX/D3D, did you tweak any graphic settings or is this default settings “out of the box?”
It’s possible the Linux version is defaulting to OGL and the Windows version is using d3d-as-implemented-in-vulkan, (or a similar situation) which could cause some differences in rendering or capabilities.
People with no money have one big problem, people with money have many small problems.