The game makes heavy use of "vignette effect" - artificial tunnel vision, dark fields at the periphery of your vision. The graphics is still blurry with TAA and motion blur turned off due to forced "chromatic aberration" effect.
You need to turn both off to achieve a significantly less nauseating and far more enjoyable visual experience with your monitor or VR.

Go to C:\Users\"username"\AppData\Local\ProjectWingman\Saved\Config\WindowsNoEditor
Find a file named "Engine.ini", open it with notepad. Copy the following to it and save.

[SystemSettings]
r.SceneColorFringeQuality=0
r.Tonemapper.Quality=1

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Other lines that could be added and experiment yourself

r.ViewDistanceScale=2
Increase visual distance, higher=better

r.StaticMeshLODDistanceScale=0.1
Increase detail of distant buildings, 0.1 is lowest (best)

r.SkeletalMeshLODBias=-2
Increase detail level of distant actors (aircrafts and tanks), lower=better

r.Shadow.MaxCSMResolution=8192
r.Shadow.MaxResolution=8192
Increase shadow quality, parts of the aircraft cast more realistic shadows on cockpit and fuselage.

The guide was made by YangDou in the discussions section
https://psteamcommunity.yuanyoumao.com/app/895870/discussions/1/4628107674950678549/

All the credit goes to YangDou.
I just made this a steam guide so YangDou's findings doesn't get drowned out in the Discussions.