Ollie didn't make a mess of the program. If he had, Hurley wouldn't have taken the job. Ollie performed terribly and wasted a lot of people's time, but we don't need to make it more than it is. A mess is Pittsburgh or St. John's when Mullin took over.
Speaking of that, you're misinformed if you think Mullin is some joke. Steve Lavin left the program in shambles and Mullin took the job knowing the beginning would be ugly. 8-24 in year one to maybe contending for the Big East crown in year four. Not bad.