I think what you're largely describing there is our defensive turnaround under Chinander - which I would be dumb to disagree with.
But offense and special teams? Turnovers and stupid penalties?
The overall results seem to stem from bad coaching, bad preparation, and bad culture - which to me are indicative of a staff that's just going through the motions.
The passion to be a national championship caliber team has been beaten out of Frost and his guys. That is of course changing the subject away from "looks like they're going through the motions."
Total offense yards per game, 2014-2020: 452, 446, 380, 385, 456, 415, 391
So Riley took at 450-yard offense and ground it down 70 yards per game in two years. Frost immediately took it back to where it was when he still had enough Pelini recruits to field a decent team plus a dynamic Martinez. But, as I've pointed out elsewhere, we didn't even recruit one full offensive until worth of contributing recruits over a four-year period from 2015-2018. So if he's shown he can turn it around here, which is the more likely issue: that he doesn't know what he's doing or that he doesn't have the horses to run right now?
Turnovers Lost, 2014-2020: 25, 27, 14, 19, 22, 21, 18
Penalty yards per game, 2014-2020: 50, 63, 53, 60, 70, 42, 60
Turnovers have been a problem for over a decade - new coaches, old coaches, doesn't seem to matter. Not sure a whole lot can be determined from that.
We were actually #18 in the country in fewest penalty yards per game last year. Yet people still talk about it like we've always been the worst in the country since Frost got here. We're still pretty bad most years but, again, that's been how it's been for years. I think it's more we just haven't been that good so we make more mistakes. I think trying to throw out all the accusations you did is more just trying to find an outlet for frustrations rather than based on any evidence that those are actually the issues.