This game is biased

How come whenever I'm flying a Thunderbolt it only takes one or two hits to shoot me down, but when I'm shooting at one I can hit him 30 times and he won't go down? This has happened more than once too... ::) 

Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=6&t=20776
Pretty amazing that someone can sneak up behind an AI in a dogfight given that the AI has perfect knowledge of opponent location.
It does happen in occasionally CFS3, never in CFS2.
Well I have to admit that it does seem to be a bit more difficult to take down enemy fighters, even tho you are getting what seems to be alot of hits on them, and it seems to take very few hit's on yourself to be in trouble.
Hmmm im wondering, I havent seen any options to adjust your gun convergence in CFS3 so far unless Im not looking in the right place.
If this could be adjusted( and it can on the real planes) that would help, as it would let one get the distance of convergance out further, or in closer depending on your expected combat situation, or for just your personal shooting/attack style.
The convergance to me seems a bit to close in for my comfort.