Been there done that.
Looking back at the times I felt as you do, it was when other things in my life were too out of control and my focus was way off. I may have even felt irresponsible by being out hunting when there were so many other things I should have been doing. Kind of like I was punishing myself for even being out hunting.
I do that to some extent every year. Life is busy, and there are alot of people who depend on me. I sometimes feel guilty about being out hunting with my two boys, when I know my daughter would love to go for a walk or ride bikes together. Oil changes, clean out the gutters, cutting firewood...the list sometimes seems endless.
I just try to do my best with everything, and enjoy the time I get. Some things are simply left undone when hunting season comes.
Hunting can go your way to the point that is it almost magic, and the pendulum can swing the other way until you feel as if you carry a curse. I have found that when I seem cursed, I slow down, and do some investigating of new territories. I no longer allow myself to sit and stew about it in a treestand. Try to find an overlooked location, or ask permission at one of the places you`ve been meaning to do so. I do SOMETHING different.
As far as shooting goes, if you have been at it for any length of time, you already KNOW what lack of focus does for you there.
You are far from alone in this. In fact, I bet this is a topic that many of us would like to discuss here much more often, but we simply do not. Who wants to talk about problems...right!?
Be brave...build a campfire and count your blessings.