First off, 190s and typhoons can't turn, climb, and can stall, unlike spit 16, they don't match at all. Obviously you like seeing spits because your a spit tard and can't fily something worth fighting in, something actually challenging, and has to fly what other people fly just to think your good. That's what your problem is
I've gone from spending most of my time in a 190-d to now spending most of my time in a Spit VIII or Spit IX. I experiment around to learn and for fun. I prefer both those versions of Spit, in the pure dogfight, to the XVI. However, neither of those ac provide me the potential for rapid entry and exit the D-9 offered. Since you fly the 51 and La-7, you should appreciate that.
Here, we doubtless get to the source of your beef: you can't turnfight your 51 (even with flaps) or your LA against Spits especially well, right? Same is true for the D-9. I asked the question in annother thread, for all the old hands to answer: at a low alt Co-E merge with equivalent pilots, how often will a D-9 win against a Spit XVI? Most of the old sticks will tell you that such a scenario doesn't look good for the D-9 pilot.
OTOH, which ac would you rather take into a high=speed diving pass on the low and slow?
You need to tailor your flying to the aircraft you're sitting in - not to the one you want to beat. That's why, when I fly the D-9, I come in with some smash, drop on the inevitably low and slow Spit, and try to force myself to pull up and clear - even if I miss. That way, I can climb back up, reset my SA, and try again. That's my goal. However, since my main failing is an unwillingness to break off a target and since my gunnery is spotty, I'll often hang onto that Spit too long, burn my E off, and find myself in a grave tactical situation. Understand, though, that when I'm above a Spit in my D-9, pointed nose down at him, I can easily point my guns at him, no matter how much he turns, by means of the D-9s superior roll rate. The real trick is knowing when to quit, nose back up, and reacquire my alt advantage. I've never been especially afraid of low spits in the d-9... co-alt La's and 51's, otoh, are a serious problem.
Here's a question for you: are you aware that your La can outrun anything on the deck - i.e., that you can escape Spits virtually at will?
You probably already know that you're a much smaller and more damage resistant target, right?
Finally, I'd recommend you spend a bit of stick time in the Spit to learn what it looks like for Spit drivers. You can learn a lot that way - like, my case, how to fly a d-9 better. I'd contrast Thug's and Junky's (if I recall the latter correctly - I think it was Junky - he was hell to try to follow) d-9 style, as an example. Thug gets himself killed because he lets his speed drop, turns too much, and doesn't properly use his roll for evasive. Junky makes a truly elusive high-speed target in a d-9 because he keeps it fast and only uses enough barrel roll to instantaneously frustrate aim - rather than using big roll excursions that only would slow him down. See what it's like trying to fight La's and 51's from the seat of a slow and fragile Spit and you will learn to better exploit those aircraft's strengths.
I'm a grateful and humble student of this game - so put a cork in the orifice that wants to complain, take off the earplugs and blindfold, and you might accidentally learn something out there.