Again, watch the tape. Guys weren't getting off blocks and were slow to react in the second half. They did pretty well in the first half. Defense gave up 16 points despite spending the majority of the time on the field in the second half do to the offense completely sputtering.
NDSU changed the way they were running things in the second half and the D wasn't making their reads fast enough or making the wrong reads. NDSU was running backfield action with a lot of zone read type stuff with QB to slow down the defense and it worked. Iowa players were slow to react. Guys weren't using fundamentals and making the right decisions. Players said it and the coach said it. Can't help it if people aren't smart enough to pick up on it.
But really the issue is there isn't anything that could be said that would make some people happy. That's fine just don't act like it is because of some conspiracy on behalf of the media or the university.