The Caterham R500 is (one of) the most hardcore versions of the car with an insane power for the little weight it has. It was designed to be a handful to drive and it lives up to that.
With the right upgrades and tune it can become easier to drive, maybe some of them are already available.
If you want a less hardcore version of the Caterham in the game, vote for it here:
(sidenote, don’t forget to vote on your own topic)