Bellichick was caught cheating and hasn't won a super bowl since.
How many AFCCG's did Bellichick appear in during his time with Cleveland?
Was he a moron then?
We can find flaws with every coach.
And its not like Rex inherited a great team, the Jets were 9-7 the year before and Rex inherited a rookie QB that everyone now thinks is the worst QB ever.
With that said, he Rex has flaws, some big, some small.