I was raised Catholic and as a child and teenager, it worked really well with my strong feelings of self-loathing
Going through the confirmation process at 15 was when my mind just rebelled against the conflict between the Catholic worldview and a more evidence-based reality. By the end of confirmation I identified as agnostic, or "spiritual but not religious". Then in college I took a lot of science and started seeing my "spiritual but not religious" thing as having a God of the gaps. By the time I got through organic chem I was atheist. After several months in AA I consider myself "atheist but spiritual". Make sense? Dunno! lol