Just to play devil's advocate, as I don't like the guy, Brady didn't play defense, and they are, consistently, a top 5 defense in pts/gm.IIRC, the Browns sucked until BB arrived, then sucked some more. In NE, BB inherited an average team and lead the team to 5? wins. Essentially, coaching his teams to about what they already were.
2001 was TB. we don't know what year he started cheating
When he was in Cleveland, I doubt he had the pull to rebuild the team in his own image. Also don't underestimate what the old ****ard learned over the last two decades of deep playoff runs, of gameplanning against the best teams in football.