My loss of faith was not as dramatic or all-encompassing.
My faith in Christianity slowly phased out over time and was the result of rational skepticism. There was no questioning of morals or the problem of evil. I think my doubt started somewhere in the fifth grade at, of all places, St Robert's Catholic grade school. We started to learn a bit more about chemistry and I remember asking a question about what our bodies were made of. I had a hard time with the answer and couldn't figure out how we could be made of the same 'kinds' of atoms as one would find in inanimate things like rocks or water. That kind of blew my mind. Things kind of went downhill from there.
My faith was kind of on the periphery for a while until a freshman in High School, when I read Robert Jastrow's book God and the Astronomers and started watching Cosmos on TV. More stuff that blew my mind and I started becoming really interested in science and wanted to be an Astronomer for a while. The final nail in the coffin for my Christian faith was again, of all places, as a freshman at Notre Dame, where I took a course on the Historical Jesus. End of Story.
Right after I graduated, I had a brief stint with Buddhism, but that got a bit too dogmatic and I finally morphed into my current state, which is Agnostic.