Volunteers quit... people sign up to help, then never show up... the church goes through a pastoral transtion and most of the stuff of the church gets dumped on your lap... Yep. Ministry does that sometimes.
I am here to say this... don't forget the reason you are doing this. You are doing it for a BIG God, and the short people. Keep the focus on Jesus and children. The rest is just background noise in the light of eternity.