When and how did you figure out religion was BS?

I didn’t spend much of my life believing in a “god” and am not sure I really fully accepted that faith “believe without evidence” assertion of a supernatural sky-daddy as I early on noted many church “Teachings” did not align with reality.

I can however recall a thought process that changed my perception of religion. It was the middle of summer between fifth and sixth grade. I spent many hours late at night slowly pacing alone in the dark back yard trying to determine what I wanted to do with my life. As a part of this process I evaluated a variety of different jobs, what they would require, and (more importantly from the perspective of a child) what that job contributed to society. As I was very good at telling make-believe stories, for many hours I honestly considered becoming a priest but when answering the question: What a priest contributes to society, I came to the realization that the job of peddling religion (based on faith (belief without evidence)) was not a benefit to society but the entire (organized religion) structure was a social parasite robbing resources for society to propagate BS with the primary intent of promoting a power, money and political base for the few (what I consider to be immoral) leaders of those organization at the expense of inhibiting correct mental process of the masses by promoting faith as legitimate process for determining truth; a poor position to maintain a rational thinking populous.

My question is: As what age and reason did you determine organized region was BS?