And theres your problem. You call everything you disagree with unreasonable when that would be a great example of a subject people could reasonably disagree upon.
For example, you correctly argue he still got starter minutes, but the fact is that by not having one of our best on the floor we started more games in a hole and that changes the flow of the game from there. It would be reasonable to have an opinion on whether that was a good decision based on that. There are pluses and minuses to that decision.
The bold statements above are your problem.
You admit that a reasonable person could have it either way.
A person can reasonably disagree and say that Lindell Wigginton should have started once he got his sea legs back under him last season, but that was not the point made at the beginning of this conversation. That is one I agree with, actually -- LW should have started over Talen last year at some point, though I wonder if Talen was guaranteed a spot behind the scenes during his recruiting process, a promise that ultimately brought him to Ames. That was not the counterpoint, however, looking back.
The counterpoint was that Wigginton was "mismanaged" last season.
What you are saying (e.g., there are pros and cons to either decision, but you are implying the net impact of it either way was probably pretty limited compared to the other issues with the coaching and the roster) is reasonable.
You have either ignored or backed down greatly from the point.
Prohm had two options, A and B, and both were pretty similar. Going with A does not mean he mismanaged B. You would have to prove that B was (1.) substantially better than A in basically all circumstances and (2.) B got really screwed, which is a hard case to make when B was playing more minutes than two of the starters.