Maybe you’re the only idiot but not the only person flying VR with AMD. I have a 6900xt and 5800x. 
Try this. Run with WMR’s OpenXR, use DX12 and enable FSR at quality level. Mostly my fps is 45-50 and smooth. In the game I move every setting to its highest value and then back it off 1 notch. TLOD is 150 and OLOD is 100.
However at some of the busier areas stuttering sometimes creeps in. I notice I’m CPU limited using the advanced overlay from OpenXR Toolkit. In those cases you can do 2 things, 1) change from quality FSR to balanced and 2) using the OpenXR Toolkit limit your framerate to 38 fps.
Good luck.