Until DCS fixes the missiles A/A combat is going to be a joke, as it has been for the last decade.
I was going to post more lengthy replies to the latest posts but then I saw this this post which not only is quite small but goes directly to the point.
Anyway, I agree at 100% with this post!
So and with this FACT in mind it's extremely hard to conceive (at least IMO) that DCS could be considered the "best combat flight simulation"!