I’ll get you started on his time at Cal. It wasn’t a “disaster”. That’s a huge exaggeration.
He’s been by far the most successful coach in the past 35 years at the school he’s coaching at right now, to answer your what has he done question.
"What has he done?" was rhetorical. I know what he has done. He has elevated SMU to a personal best 3rd place finish and 0-2 in bowl games.. My bar is higher.
Huge exaggeration? Hardly. I base my statements on data.
Out of 128 teams, Dykes Cal team was
126th in scoring defense in 2014/15. If that isn't a disaster, what is?
Dykes defense gave up 43ppg or more
9 times in his last season there. 45, 43, 51, 47, 49, 45, 66, 56, 45 were the totals in those 9 games.