Mate, treat it as a maturing process. You're quick, and you've proven that. Take pride in what you've achieved and don't worry about what others say. If you do ultimately make it you'll get heaps more attacks than this.
All the GT guys have been under a lot of pressure, partly because they dont fit the normal mold of a racing driver (IE started karting at 6-7 and racing ever since) and they are beating people with tons more experience. There is a lot of tradition with motorsport and there's often some friction to a non traditional approach.