Look, fan disappointment like this doesn't just happen in a vaccum, or over one season.....it's usually a cumulative effect. Take the following:
1. 2010 sucked given the talent on the field. For most people, this was the beginning of the end
2. 2011 was simply average and ended badly
3. KF has the chance to rejuvinate the program, especially on offense where with the exception of 2002, hadn't sniffed Top 50 in scoring offense. His answer was to hire a card carrying member of AARP who's answer to 3rd and 8 is to run a 3 yard out to the wide side of the field requiring the QB to throw the ball 30 yards horizontally to gain 3 yards vertically.
4. The results of that hire are playing out with one of the 10 worst offenses in college football
5. To make matters worse, the QB is having, statistically, the worst year EVER under Ferentz....worse even than either of the first 2 teams that won a combined 4 games. But KF is stubbornly sticking with him.
6. Given all this, the coach makes Top 10 money nationally and the athletic department makes Top 15 money nationally. But the product isn't even Top 50.
7. To pay for all of this, fans are paying triple and sometimes quadruple what they paid when Ferentz was first hired.
So yeah, I'd say every fan has a right to be pi$$ed right about now.