First off I'm not advocating one way or another on Stitt. Just going to point out why what he's done at Colorado School of Mines is actually pretty impressive.
While his record may not be the most impressive (same with his playoff record) you have to look at how he turned that program from a bottom dweller (and sometimes mediocre) to a very good program even with the very strict academic requirements for getting in to that school.
Playoff appearances in the past 50 years (not counting Stitt's years): 0
Above .500 seasons in the past 50 years (not counting Stitt's years): 4 (1975, 1976, 1979, 1991)
The 5 years before Stitt? A combined record of 13-41.
Hell, look at the last year before Stitt was hired. They were 1-9 with 9 straight losses to finish the season. The combined score of those 9 straight losses? 418-54
Since Stitt was hired they've been to the playoffs 3 times (and to two "Bowls" it looks like) and had 13 out of 15 years above .500 He basically turned that program around from awful to pretty damn good and did so with a very exciting style of offense & a major recruiting hurdle in the form of academic requirements.
Again, not advocating one way or another, just wanted to point out what is impressive.