What problem are you having with the drifting, exactly?
I found that with the grip stat, three dots is "neutral", which is to say if you put it in a drift it more-or-less stays as slewed out as you put it. In my experience, less than three means you need to keep turning in to keep drifting, and more than three means you need to counter-steer a lot to keep control.
There's a three-dots drifting car you get relatively early access to, and even after getting more powerful machines I stuck with that one. Drifting well just meant finding the right attack angle to get through the corner and relatively little fighting with the car itself.