Well, if you want to feel slightly better about it, I think this is a glass mostly empty perspective. In college, he took over a bad Temple program and a s#!tshow Baylor program. He had them both notching double digit wins when he left and he accomplished it in three seasons at both.
The NFL flame out is a black eye but less relevant than relevant to his collegiate prospects. A lot of the Carolina failings had more to do with mistakes off the field and with roster management moreso than his abilities as a head coach. And it is very tough to compare NFL roster management to collegiate roster management. The two are different in just about every conceivably significant way, and Carolina management was just as culpable in contributing to those errors as Rhule was.
Anyways, sorry, didn't mean to rain on any pity parties.