I doubt you can ever reach a great feel, if you start with a wrong cornerstone.
The only right setting for linearity on a wheel is 50%. Then the steering wheel input will always produce the same amount of front wheel turning.
I beg you to put it back to 50% and set up steering ratio in your car setup menu to counter that laggy feeling with low steering input. But then for the redt of corners you should have a better feeling.