Let’s skip ahead.
You sell your Vintage Speedster of Arizona and probably get a pretty good price for it given the current market. You then buy a different Speedster replica or a different car altogether. Maybe even a completely different toy; one that will actually make you happy, because life is too short to live unhappy.
I feel your pain, @JPC - I really do, because I lived it about 10 years ago with my JPS.
... but the thing is, griping doesn't solve anything. It isn't going to make you any happier, it isn't going to fix your car, and it isn't going to make the experience any better. TwinCitiesSpeedster has some good advice here. Short-circuit the anxiety.
It's time for a cold eye. Look at your car with as little passion as possible, as if you are a potential buyer, not as a jilted lover. Can it be fixed, or are the problems baked in the cake. Can you own this car without being reminded every time you see it how disappointed you were with the purchase?
If you can't/won't ever love it, sell it and get what you want. If what is wrong can be fixed, then get it fixed and start enjoying it. I ended up selling my JPS at a loss, and then getting what I really wanted to start with.
Life's too short to live in between.