I agree with the points made. It must be an unwritten rule somewhere that if someone is trying to dive in to help you, you must execute a turn that will give your friendly no chance at a shot. Lol, at least that's the way it seems.
What to do? Most good pilots will tell you what they need you to do for them to help. However, there never seems to one around when you need one. I drag straight, and gradually guide toward oncoming friendlies. I usually wont break turn if a friendly requests, because more often than not you will die first. When straight is impossible due to range, I will zig-zag keeping the same general direction. This has a life expectency limited by your speed degridation, but it gives would be helpers a better chance, than reversing underneath them repeatedly.