I'm not sure if anyone has been through this or not, but, have you ever lost trust in God?
Have you ever prayed for something and the outcome has made you lose your peace? And actually, before even praying for it, you couldn't really mind whichever option or outcome happened (i.e. either the door closed, or opened... you're not really insisting on a particular outcome).
Surely that would make you lose trust in God ? Just as much as someone could believe in God by praying for something and seeing it realized, the same applies for praying for something and seeing only bad things come from it.
I don't think this will make one atheist.. It just makes you dislike God. No?