Apparently the game seems to run at the monitors refresh rate if you play it in windowed mode (on my oled deck it runs at 90 fps), if I set it to full-screen it runs at 60 capped. The problem is fixed in windowed mode if...
Extra follow up doing a comparison between logs, curious if these 2 messages in the first log (Running with protons built in d3dx11_42 file) mean something since they doesn't show up if you use protontricks to install d3...
Followup: If you use Protontricks to install d3dx11_42, not only does it stop the crashing, but also finally gets the screen rendering.  Launching it with PROTON_USE_WINED3D=1 %command% makes this pop...