There have been bigger busts in the league, but overall he was a disappointment.
He's the very epitome of a jock - entitled, arrogant, always thought he was better than he actually was and unlike the greats didn't have the work ethic. Pats sucked in 2000 and early 2001...and then he gets hurt and the team IMMEDIATELY is great when a second-year, unathletic 6th round pick replaces him.
Belichick traded him to a division rival IN HIS PRIME because he knew exactly what he was.