Your main point doesn't have a leg to stand on though. Plenty of coaches, even elite ones, have stunk at their previous team. And others have succeeded, then failed at a bigger program. There are zero guarantees unless one of the select few ELITE head coaches are at Nebraska. And that still doesn't guarantee anything.
Michigan paid Harbaugh $9M this year, 10-3 record. I consider him an elite coach, and after two seasons, he has one [or two?] more wins than Brady Hoke after two years. Is it window dressing? Doubtful, but the jury is still out. NU fans would be slamming him right now if we ended 10-3, while paying him the kind of money he's getting [this year].
Some people, and you seem to be one of them, only want Nebraska to be successful if "your preferred head coach" is in charge. At the same time, you give the current guy no chance to succeed. Because, well, he's not "your guy".
Every single fan should want Riley to succeed, at the highest of levels. And every single fan should support him to do that. Especially after two seasons, with all the problems the upperclassmen from last year and this year have caused.
There's only a handful of them left, the leader being Josh Kalu. Problem for him is, there's a couple new sheriff's in the locker room that'll knock his ass out if he tries some of the crap the others no longer around have.
Sit back and enjoy the new year. As coach Riley said, "this is the end of one team and the beginning of another". That right there should tell everyone what's been going on.