My reading comprehension is fine. You ability to construct a well thought out paragraph, on the other hand, not so much.
You make three declarative statements, and then your fourth sentence explicitly says that sentence is your opinion. If it was all just an opinion and not a statement of the facts as you see them then there would be no need to say that it was just your opinion, that would have been obvious from the context. The fact that you had to explicitly state that you were then just giving your opinion in the fourth sentence pretty clearly indicates that what came before wasn't just an opinion. Or at least it does to people who actually have good reading comprehension.
Secondly, well yeah, KM-M didn't succeed as a college head coach. I mean you get that if she had she wouldn't be an assistant coach anywhere, not just at Pitt, right? When Nick Saban was looking for an offensive coordinator who was a great offensive coach he didn't hire Kliff Kingsberry, because since he was a reasonably successful head coach he already had a better job. He hired Lane Kiffin, who had failed as a head coach. Or if you want a basketball example with a Pitt flavor, people weren't hoping that Jamie Dixon would bring back Tom Herrion because he was wildly successful at Marshall. TCU and Georgia Tech didn't hire him because he was a raging success as Marshall's head coach. He was available to be hired because he was a failure as a head coach. You understand that's the way these things work, right? Successful head coaches don't take jobs as assistants, unless it's a head coach at a lower level becoming an assistant at a much higher one. You understand that, don't you? When Bob Huggins hired Ron Everhart to be his assistant at West Virginia it wasn't because Everhart was a raging success at Duquesne, was it?