I'm not justifying anything I'm telling you how to fix it. You can cry or you can learn, your choice.
The fact you say "without any effect of tire losing grip" is a perfect example of what's wrong with arcade gamers.
That turn is the peak of an uphill directly leading to the downhill. It's the highest elevation of the track, you are slowing down, transferring the entire weight of the car to the front tires, (off the rear) while turning at least 120 degrees on the wheel, clipping a curb, outside of the max grip driving line, on cold tires, with a completely wrong driving line, with a garbage tune on your car and a completely open LSD.
And you wonder why you lost traction on the rear tires? People like you are everything wrong with this game. You think you know what you're doing and will point fingers at everything you can to justify your ignorance.
The game isn't perfect, by any means, but the problem you are experiencing can 100% be fixed with proper driving and proper tuning. I attempted to help you with both, but you refused.
You don't want to fix the problem, you don't want to learn, you don't want to get better, you just want to cry and complain, and seek for validation in an echo chamber of ignorance.
Enjoy whatever game allows you to drive like an idiot, not tune cars, and somehow magically get max grip, that sounds way more realistic. 🙄