As somebody who was raised catholic and went to private religious schools, I always had a really hard time trying to believe in a god. One day this pastor came in and had a little sermon where he essentially told everybody that it was ok to question your faith. This was a relief to me because I thought I was doing something wrong because I questioned the existance of a god. Bear in mind this was when I was like... 9 or 10 years old.
I put religion on the backburner for a while after I got into highschool. It was still something that was kind of there, but it didn't have much bearing on what I did. I found myself resenting a lot of the arbitrary restrictions catholicism put in place, such as not eating meat on fridays during lent (or something). There's also the whole bit about repressing your sexuality.
I started taking a 2 year physics course in highschool. I failed miserably at first, but then one day something clicked. I altered the way I was looking at the problems, and suddenly I was acing every test. I went from the worst student in the class to the best. I learned the science behind a ton of things I previously didn't understand, and I changed my methods of thinking so that I could logically deduce the answer to something when I wasn't immediately sure. At this point, religion was still on the backburner.
I don't remember specifically when, but one day I came across a video on youtube from TheAmazingAtheist. As much shit as that guy spews, it made me consciously think about religion again. Almost immediatley I decided there was no persuasive evidence to support the existance of a god, and threw religion away entirely. I also realised it was ok to identify as an atheist.
I don't know much about mormonism, but being raised catholic is straight up indoctrination. In a way, I both resent and appreciate my religious education, because it fucked with my head for the longest time, but now I can pin point all the reasons why I don't believe in or support any religion. I'm still fucking embarassed at the amount of bias I had against any sort of information that conflicted with my beliefs before I came to this conclusion. Learning about Luther's 95 theses and how corrupt the church was (and still is)? That was history. Of course it's all better now!
tl;dr being raised religious broke my head, and studying physics fixed it. Then I explored my religion and the history behind and decided it was all bullshit.
E: Lol warlord I was thinking of that exact quote.