I am agnostic as well because of personal experience.
Have you ever fallen in love with someone who seemed so perfect, so pure, that she was an angel in your eyes?
However, after having been betrayed by this person who claimed to hear the voice of God most nights and called herself "one of the few true Christians," I am torn by my beliefs. God's angels have fallen from grace before, and it appeared to have happened right in front of my very eyes.
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Skyward, my experience has been VERY similar.
I went to church as a kid, not every week, but more than just Christmas/Easter. I always felt there is "something/someone big" out there but not 100% sure on it.
Went thru college, never went to church other than for weddings. I had roommates and fraternity brothers that ranged from ministers to sworn atheists,
I always tried to do the right thing, and be a good person.
Fast forward to Primary. Meet a nice girl. She goes to church once-twice a month. We were dating, I would go Easter, Ash Wed, etc.. We ended up dating, engaged, got married. The whole time she played the "good church going southern girl".
Then I started seeing the hypocrisy. She would do wicked things, then blame others and go "Im a GOOD CHRISTIAN". We would go to church, and half the people there that were agreeing with the minister (she had morphed from laid back contemporary services, to fire & brimstone baptists when I was gone). But I would see their cars at the seedy strip clubs and dive bars.
Constantly used the bible to justify things she wanted (not working, no sex unless she was ovulating, etc) but she would ignore it in other areas when it suited her.
And the ass-raping I got when we divorced, even though "little miss christian" MADE PORN when I was in the gulf, has me convinced that if god exists, he hates me. Or has a really sick sense of humor.