RE: Let me re-phrase the "failure" question..
We eat all the deer we kill, so I usually kill from 5 to 7 deer. And on top of that I pass on no telling how many more. Having said that, I can't imagine what would cause me to not kill a deer throughout a whole season. I may not kill the buck I'm hoping for, but I'll still kill some deer.
If I didn't have some sort of injury or illness keeping me from hunting, I could only describe not killing at least one deer in a seasonas no less than a debacle.