I'm going to give you the same advice you gave me before. Time to take a break. Get some rest. Disengage for a little while and pull some thoughts together. Oh, and the blame issue, stop blaming yourself. Remember you did the best you could do with the skills that you had at the time. That's it. Nothing else to say. We both know we had problems that were factors in the Rs going south, but as we say here at the National Training Center, "you don't know what you don't know". Don't be so hard on yourself.
Some thoughts for after you take your break. You have been successful in the past. What was working? What's not working now? Can you go back to what was working?