Yea I have seen this happen with a lot of people, once things go down that road it is really hard to go back up. One thing is the eventual failures, but constant, ever present failures that get reminded repeatedly tend to be some of the most daunting things you will have to deal with. Reminding yourself that failing is a natural part of learning is hard when no one around is actually willing to see you through it. I usually remind myself constantly of why I do things so I can pull myself through excesive failures.