A few points to consider.
1. The 5-7 record of course impacted bowl attendance, but the killer was being the day after Christmas. I know a lot of people back in Nebraska that usually go to the bowls, but being in Santa Clara for Christmas, or flying out on Christmas just weren't options. I also have quite a few Nebraska friends here in SoCal that could not drive up due to Christmas plans.
2. The picture the OP posted is a bit misleading. There were 33K in attendance. While possibly an inflated number, it looked about right to me as I looked around the stadium. It was 40 degrees at KO, which I found uncomfortable, and the UCLA fans found really uncomfortable. Levi Stadium is really neat in that they have heated concourses ringing the stadium levels with windows that look out onto the field. We were all in the concourses having food and drinks when that picture was taken 10 minutes before KO. We found our seats two minutes before KO. So while the stadium was pretty pathetic as far as attendance, it was nowhere near as bad as the photo indicates.
3. The general thought of both the NU and UCLA folks I talked to was the split was about 60% Nebraska fans/40% UCLA. That put us around 19K fans. Some folks can scoff at that and question how well Nebraska travels, but 19K the day after Christmas, in a area of the country that isn't as neat as other bowls, to see one of our worst teams in 60 years is pretty darn good in my way of thinking (of course, I am a homer).
4. The real question should be where were the UCLA fans? The answer is they also had Christmas obligations, they also had a disappointing season, but mostly, they don't travel well at all. In 2014 (2015 stats not in yet) UCLA averaged 19th in home attendance at 76,650 in a 91,136 capacity stadium. USC is 21st averaging 73,232 in a 93,607 capacity stadium. It kind of figures that if the hundreds of thousands UCLA alum and fans here in Southern California don't fill their own stadium here each week, they can't be expected to drive 6 hours north to fill someone else's. I was disappointed they didn't have a lot more people there.
5. Addressing the comment about Coach Riley being a bad coach, that remains to be seen and many of our fans are on the fence yet. However, subsequent to the "come to Jesus" the players and staff had after the humiliating Purdue defeat, we beat Michigan St., you, played Iowa tough, and put a physical beating on UCLA yesterday. We are therefore hoping things are turning around and we can be top 10-15ish sooner than later. Until then I admit our team is not that good and if we deserve to be in future bowls at all, it will be one of the 33K attendance bowls until we can get things straightened out.
6. As long as I am over here, I sure wish you would have hired Bo Pelini and taken over the buyout we are paying him.