I'm not arguing this is definitely the case in respect to that specific coach, but generally speaking:
Results at a smaller school with limited resources--compared to a school like Texas--aren't necessarily indicative at all of that coach's ability.
One example: Dan Mullen. In 9 seasons at Mississippi State, his SEC conference record was 33-39. He took over a Florida team that had gone 4-7 the year before he arrived, and had lost 4 games or more in all but one of the seasons under Muschamp and McElwain in the previous 7 seasons.
Mullen went 10-3 in year one, and 11-2 last season. They're currently 6-1, ranked 6th in the CFP poll, and have gotten better as the season progressed.
Saban was 34-24-1 in 5 seasons at Michigan State, and you know what he did when gifted the resources of LSU and Bama.
Les Miles at Okie State vs Les Miles at LSU.
Kliff Kingsbury had a losing record at Tech, and in his second year at Arizona his team is one game out of first place in the NFC West.
This is one of the reasons I believe Urban Meyer is the best coach in college football. He didn't just do it at UF and OSU, but Utah as well.
Anyway, I hate seeing fans dismiss a coach's potential because he's not setting the woods on fire at some small school with little resources and no history to speak of. These guys aren't fucking magicians.