Just answering your question...he went 11-5 with a backup quarterback. No he didn't make a playoff that year in a tough AFC division.
Are you really questioning Bill Belichick's coaching ability without Brady?
How was Brady in college...last I checked he wasn't an all-american.
I am not questioning Belichek just pointing out that in the NFL you need to be a great coach but you need some luck also. His record before Brady was about the same as Carrol's.