Sorry for the delay. I botched my CPU in a failed OC attempt last night, and had to get it replaced.
I take it you are using the default setups and/or aids. They are tuned in for loads and loads of understeer. Try this and then make your judgement on the physics.
Take any track. Set the rear wing to what you would use in GP3 or GP3 2K. Set the front wing at +3 to the rear. Then set springs to 1200/900, ARB to 2000/200 and remove all fast and slow dampers and packers settings. Set them to zero. You might also want to raise the ride height to 40/60 if the plank scrapes. Turn all aids and steering help off. Especially traction control as this masks and smoothens almost every driver error you can make and at the same time it improves lap times somewhere between 1 and 2 seconds.
Take the car for a spin, and then let me hear what you think of the physics. If you still find it way to easy, then all I can say is that you probably have been or should be in a offline league.
I have done 1.17.554 at Nürburgring with no aids and 5 laps of fuel left. The tyres had driven 20 laps. But I still lose control about 2-5 times per 25 laps. I even spin from time to time.
It's only after we've lost everything, that we are free to do anything.