I’ve managed to sort out the antialiasing issue by using Nvidia Inspector, setting antialiasing to override and setting 32x with transparency supersampling to 8x. At 1080p it gives good visuals and almost all aliasing is now gone, I also disabled sharpening and film grain filters in Usercfg file for MSFS, I am now very happy with the results. I also can now set higher settings like clouds ultra which I was not able to do before. This is on a GTX1060.
Of course YMMV.