Game runs way better using DX11 compared to the native Vulkan version, also there are so many graphical glitches and artifacts that just make everything look like clown vomit. I’m not even going to mention the amount of stutters and other performance issues that are present in the native Vulkan renderer.
I’ve tried using Proton instead of the native Linux client, and it runs great, no more broken ambient occlusion, and the textures are in the right place.
That would depend on the flags set by the developer in the EAC panel. EAC provides a linux runtime for linux users, that also has to be enabled by the developer of the game. Otherwise you are stuck using a VM with GPU passthrough on linux systems which is sub-optimal.
I have not personally said anything alike? I’m not sure what your point is.