As a stalwart luftwaffe pilot, heres my answer:
The spit 16 is just ridiculous. It has almost no hole that can be exploited offensivly (ie, there is nothing that you can exploit in a fight, to give yourself an edge). It zooms decently, it rolls well, it turns good, it can dive to acceptable speeds without compressing, and can turn decently at higher speeds).
While this makes them good planes for noobs, they're almost game exploits for veterans. I mean really, almost nothing can match the versatility of the spit 16, the only planes I would say even come close are: 109K (and G-14 to a lesser degree), the F4U, La-7, and the Ki-84 to a limited extent. Equally skilled pilots flying a 190 and a spitfire 16, 9 times out of 10, the spitfire will win.
And as for the British members of our game, theres other spitfire models out there, that are better representative of the spitfire in WII, and aren't advantegous to the same degree.
So in my view, if you aren't a noob, you have no buisness flying the spit 16. You're out for your score, or out to win a fight, rather than out to enjoy the fights.
Thats just for the spit 16. I don't activly hate the other spitifres, since they have exploitable characteristics, but I still dislike them because, even though they have a low average pilot skill, they're still easier to fly than just about any plane in the game.