I am the guy that Judoka refers to who noted that KJ ceiling was probably that of a somewhat above average coach. As I stand now, I am okay, but not wholly satisfied with KJ and could potentially be happier with a different head coach.
Regarding such anonymous "wrestlers don't respect KJ comments," however, I take them with deep suspicion. Fans make such accusations of coaches all the time: mostly when teams seem to be under performing, but also when they are not. I don't know you and your connection to the team; nor am I any sort of insider myself. So I weigh vague claims such as yours against identified endorsements of KJ by people like Varner, Reader, Nickerson, the CWC leadership and so on. Are they lying? Sure its possible, but I don't see it as likely.
Admittedly, the program has had some discontents: Bono, the AZ 125#, and so on. All programs do. KJ has also faced some unreasonable axe grinding on this board, that is apparently about many things, bruised egos and race being front and center. That stuff is trash.
In the end, the best judgment is that of performance on the mat. And that takes me back to thinking that KJ is an above average but not elite coach. He's making ISU better, but slowly. He's making decisions, some good some bad. On the whole, ISU is not on top -- but frankly it hasn't been there since 1987 and more relevantly, since Nichols. That tells me its also a question of the AD and not just the coach. Voila.