Oof that’s rough. Are you using the vrperfkit to squeeze some more pixels out of it? You can get about 25% more pixels for the aame performance using this:
I would suggest going into the yml file and using NIS scaler, setting renderScale to 0.67, then setting DCS to 1.5x more pixels in SteamVR.
If you also prefer instruments clarity over smooth terrain outside, up sharpness to 0.8 in the yml.
Then copy both yml and dll file into DCS’ bin folder.