I am definitely not a nube when it comes to Gran Turismo, also not one of the best out there.
That being said, GT 7 wet tracks and wet licence tests especially the final one is just bloody ridiculously difficult to complete.
To such an extent that the Gran Turismo series just lost a dedicated fan of many years past.
Definitely not a enjoyable experience anymore. I truly pitty the newcomers and inexperienced players out there. Polyphony and Gran Turismo is going to loose a big fan base because of this....
Similar situation as me. Been an avid fan but average driver since the first game, and there's times already when I've had to check my wheel is functioning correctly!
Stick with it though. The thing is, we've come to view the license as just something you get out of the way, and earn a few credits along the way - rather than something that actually teaches us how to drive. Pretty much since the first game the skill of driving for the average player has largely represented relying on muscle memory, and then beating somewhat easy times. This time around the new physics requires you to learn again, you actually have to interact with what the game is telling you.
I've just done IA license final exam (AMG GT at the Nordscheife), and it occurred to me, that driving quickly in this game is going to be like balancing the narrow end of a ruler on your finger tip... it's all about fine balance. Can't say I loved the E30 M3 in the wet test, but I don't think it's been the hardest... on the flipside, one of the early tests with an EK type R at Tokyo, and the Lambo at Tokyo just feel beautiful to drive in a way I don't think cars did in GT Sport.
Compared to earlier games, mastering the car control, and not crashing or spinning is the real challenge here, getting down to the gold time will just happen as you try more and more.
I don't know what settings your wheel has, but I've turned the sensitivity of my Thrustmaster GT wheel down to about 2, and turned the FFB torque down quite a bit too, it seems to have made the cars more stable...
... and I'm using TCS 1 - which I never had to do before.
I'd venture that those using Dualsense controllers might not appreciate how significant the change in handling has been.
... having said all of that, the reason why I've not rage quit yet, is because there's a fair chance this is closer to what it's like driving road cars on the limit in real life. To begin with, it's like, "I can't believe how unstable this car is"... but then, I've never tried to get a road car, on road tyres, around a bend at 100mph before. We're used to going flat out in GT, I don't think GT7 is the same (although the license test at La Sarthe in the R92C comes at you like all hell!), but I think it's a better "simulator" for it.