The quilty ones seem to feel the need to be the loudest ones too! Generally when a driver is resorting to personal attacks on his rivals, it's because his winning ambition is frustrated by:
a) slow car
b) classy rivals
c) lack of talent
d) all of the above
In GT's case, I truly believe a) & b) to be true. To think he can win the races in the first two corners (a la Paul Morris) suggests that mightn't be the brightest bulb on the Christmas tree (actually I think it's more about him trying to get his slow old clunker in front of as many of the quicker cars as possible before they get into a rhythm -- admirable sentiment, but hardly practicable or advisable).
As far as the whinging goes... while I think that the Enforcer might tend to get a bit caught up in his own public image, his philosophy of sorting out any disagreements one-on-one, rather than carrying tales to the press is one that many current drivers could learn from, particularly in the light of events from the Main Event (and I wasn't going to mention THAT ever again!)