"In a study of religious deconversion, we analyzed 50 on-line testimonies posted by former Christians, and in these testimonies we found four general explanations for deconversion. The first explanation, which I wrote about last week, regarded intellectual and theological concerns about the Christian faith. The second, which I elaborate here, regards a failed relationship with God. Almost half (22 of 50) of the writers expressed sentiments that in some way God had failed them by His not doing what they thought He should."
It's worth a look. Here's the rest.