1. Are you using the latest version (the one with the F1 car). The tyre behaviour is very different.
2. Whilst comparing it to real life, do you often brake at the last possible second, riding the limit of traction whilst downshifting and trail braking into a corner again right on the limit? If you do you are a fool, as public roads are public. However, I bet you don't (you might think you do, but you don't), so is it really a fair comparison? Think about what you do in the 350Z hatchback, and do the same in LFS. The results won't be too far off, but you have to be sure your throttle, steering, braking and speed are the same as in the 350Z which is tough.
The best thing to do would be to post a vid of YOU driving in real life, and YOU driving in LFS.
3. nKP has quite a few flaws in the physics right now, and quite a few of us are patiently waiting for patches to correct this. As it is the car behaviour is plain wrong in many cases. The cars are not fit for comparison with road cars, and Kunos has basically disappeared. At the moment it looks like nKP is dead.
4. Remember, you cannot feel the g-forces, and the sense of speed in a game is very different. Thus you'll find that in a road car you'll be tootling along at 0.5g max, and being relatively smooth, but in the sim you'll be hurling it about, turning at too high a speed, and generally driving like a loon.
All of us in LFS welcome constructive critisism, especially from people with real driving experience. It's such a shame that you're linguistic skills don't allow any constructiveness to shine through. Perhaps a few more posts with some more detail and analysis would be a good idea.