You'll find that most similar r/l cars are a LOT more predictable than the RAC. It's chassis is sensitive to throttle inputs like a good mid engined car should be, but when you combine that with a torquey turbo lump, poor weight distribution and limited setup options, it makes is a tough car to fully get to grips with.
If you don't trust your car you won't enjoy racing it, so not many people do.