We actually ranked 34th in the country in rushing yards per game. But the most obvious thing to talk about there is probably how much of those yards were put up by our QB's.
I'll ignore the fact QB rushing in college includes scrambles and sacks below, but note that Haarberg in total averaged 4 yards per carry, with 477 total rushing yards. Raiola or Kaelin, as pretty strictly pocket passers, would presumably average about 1.5-2.0 yards per carry based on what similar pocket passer types average. They'd likely be in the positive, but not by a lot.
I'm not discounting the possibility of the QB run being significant. Guys like Tommie Frasier and Lamar Jackson averaged 6-7 yards per carry for a season. We didn't have those guys back there, and we didn't have an offensive coordinator familiar in any system that highlights a guy like that. People would criticize Haarberg on the option for not pitching it, and while there are certainly times he should have, most of the time there were just too many defenders waiting at the bus stop.
That's the crux of why QB rushing yards are not really a big factor in this team's rushing production. Box count is the biggest indicator of a rushing plays success. Simple math, the defense wants +1. That's one guy for every blocker, +1 for the ball carrier. In theory, the QB in the run game adds an extra man for the offense for the defense to have to account for. The problem for Nebraska was, the defense had no problem doing that because they'd stack the box all day, anyhow. 8 man boxes were common, and usually a potential conflict LB could cheat inside for a 9th man because we did such a poor job using our passing game to help our run game.
When the QB run game was good, and remember we're ignoring scrambles and sacks, it was because the box count was good. We didn't have the scheme or the talent at QB to make the running game good when the numbers weren't favorable. There are offenses like the option, veer, read option that all highlight the QB and make him someone that you must account for that then makes it easier for other producers, but Satterfield just isn't the guy that's well versed in the sequencing and micro adjustments those systems need. Nebraska by cfbstats numbers was 39th in rushing yards per game, but 54th in per carry average. Kansas, a team that does a much better job incorporating the QB run game, was 9th per game and T9th in average.
What is Satterfield good at? He can be a pretty creative play designer, particularly when it comes to personnel. Better spacing, and more mismatches for the defense to account for, will create (IMO) a better overall run game this year than we saw last year.