I think the problem is saying a car is "undriveable" puts blame on the car/game instead of the driver. I mean, I know we're all pretend racecar drivers and excuses are part of the game lol
I get what you're saying, if the car has potential which one driver cannot unlock but another can, a difference in driver talents (not necessarily level of talent, but range of talent) will make a difference in how they perceive the car or how forgiving the driver is of it. The Stratos had huge potential and in the right hands was unbeatable. However, not many professional rally drivers could get the best out of a Stratos. Sandro Munari might call it the best handling car ever, most would call it difficult. Frankly, Sandro himself may call it that too.
Whether or not it can be tamed by some, a car that cannot be tamed by many can reasonably be labelled with difficult handling, expressed in whatever words or hyperbole the driver tends to use. That is a label, a characteristic, that should be applied to the car and not to the driver. Either way, I don't see it as blame, it's just what it is.
I've never driven an F40 but I've read an awful lot of road and track tests of the car, and they create an expectation on how the car handles. The F40 in game didn't meet my expectation. It had a less responsive front end and more traction than I expected. Meanwhile the 308 felt the other way around, which was closer to expectation because in period the handling was described as good but nervous, and the longer wheelbase Mondial often got described as more progressive. Personally I prefer cars with a bit of understeer, but not too much, to neutral. Not everyone prefers that balance but it is what works best with my senses - and requires the least adaptation from me in my driving.
If the driver is to blame for cars which have handling they don't like or struggle to get to grips with, then this whole thread is meaningless, because any post describing a car as ill handling can be dismissed as long as at least one player can post a video of themselves doing tidy laps in that car.
Sorry, long post 😆. We probably have different opinions and I'm cool with that.