Nothing you can do about that, gave up on that a looong time ago. My setup is for PVP, to "pretty things up" you want a 9900K CPU and a 2080Ti, nothing less.
The new graphics engine would be Aerofly FS 2, razor sharp shadows, high FPS, or even War Thunder,
DCS already has an 'outdated' graphics engine, or rather was busy with war planes, and there is nothing anyone can do about that.
Change priorities or fly MS Flight Simulator 2020 when that arrives. That looks pretty.