Who knows, it seemed at the time like part of the lightning in a bottle there was (very ironically) the culture and personality Frost brought to the team, along with obviously the great offense. I still remember watching those behind the scenes videos of UCF in 2017, before every team had them, and thinking "holy crap Frost could be the guy to finally modernize Nebraska football, he has such a fresh approach, these guys all love him, they're working hard and having an absolute blast."
For whatever reason, we did not get that guy. I'm sure there could be a fascinating psychological case study done on him haha, but clearly a ton of factors led him to being a completely different guy at UCF than he was "back home" at NU.