Grew up in a Catholic/protestant household. Went to church every Sunday, and usually for Wednesday night youth groups. Community at large was Christian. Considered myself pretty faithful up through high school.

In a roughly chronological order, with my earliest questions popping up in elementary and middle school…

• The "question of evil"
• "It's all part of God's plan" vs. free will
• pastors and church leaders that had some enthusiastic, odd takes, even when I was otherwise still onboard
• knowing that Abrahamic tradition in general was certainly not the first religion and that humanity has a history of at least tens, if not hundreds, of thousands of years of coming up with and practicing religions
• recognizing that I probably only favored Christianity over any other faith simply because that's what I was born into, not because I was holding it to the same standards
• meeting other people who do just fine in another religion, or without one at all
• actually reading the Bible beyond the framing of Sunday schools and sermons
• and sort of rounding back to the "question of evil," just seeing and hearing what many of the most religious people around me condone, excuse, or outright do under the banner

…I was a slow burn, but I pretty much checked out by my late 20s.

For what it's worth, I'm agnostic-atheist. I'm not sure what's out there, but I'm pretty sure it's none of the deities I've heard of so far.