Personally, I think when one is flying something that holds every card except top speed against "X" aircraft, you can expect "X" to engage using energy tactics and extend if the energy state is equaled and positions reversed. If you are in a given model of Spit, then the selection of contemporary planes who have little in the way advantage over you except top speed is going to be large, thus you are going to get that treatment quite a bit, but IMO, that is no reason to complain. Besides, there are always plenty of other Spits to fight.
Just as the high-wing loaded E fighter faces the challenge of a difficult snapshot to defeat the low-wingloaded angles fighter, the angles fighter must be quick and accurate in his shooting if he is to get the kill on his reversal before the faster plane can extend. Perfectly fair.
That said, there is no real fault in any individual flying any available airplane however they like. If an airplane has too many advantages relative the others in the same arena set, it is up to those running the game to assign it a high ENY/perk price.
I can understand the OP's frustration. Notice he said he wanted to counter a BnZ style. If someone smart if flying one of the planes he listed and has an alt advantage the spit will never kill them. Now that scenario is a perfect one of coarse but it illustrates his point. I have flown the MW quite a bit lately and there are many pilots in there that only want to score well and not find a good fight. It does seem like it is getting more and more rare that someone will want to fight till the end in there. So I can not blame Black Jack for wanting to get in a faster ride when everyone is running away from him.
With that said I will offer one suggestion. If you want a fight down low and slow you need to get out of MW. I have had alot of fun playing in EW and had lots of great fights there.
Also if you enjoy MW enough to stick it out then try the 109-F its great for dealing with someone trying to BnZ you. That airplane can hang on the prop forever which may give you a few shots as the enemy zooms back up.