Try these settings on the wheel for tdu2, it should help loads with the drivability:
Vibration: Middle
Force feedback: High
Steering Sensitivity: 2 pushes right from Far left
Speed factor: Middle
Steering Damping:Fully Left
Deadzone: Fully Left
Clutch Linearity(if you have one):Full Right
Throttle Linearity: Fully Right
Brake Linearity: Fully Right
Still not the best, but easily drivable if you just want to cruise around 180km/h staying in one lane.