Thats a kinda funny thing to say about the map in particular, since they've improved it a thousand fold. New map is already well into development, my moneys on the med somewhere.
Make sure you set the nvidia control panel for the il2fb.exe rather than the il2.exe.
Then use these settings. The mix of 16xQ Csaa and Supersampling gives the best results, as long as your card can handle it.
As mentioned before, the game was never designed with more than 4:3 in mind, so even on a basic 16:9 / 16:10 res, clouds will be stretched at the edges of the screen, as that area was never designed to be rendered.
Ahhh forgot your running triple screen.
Nothing that can be done, game was never designed to render that wide a FoV, which is why it gets worse as you get to the edge of the screen.