Idk. My parents sent me to Sunday school. It was very sedate and unobjectionable content. No fear. No hellfire. Mostly, try to be good and when you fail at it ask for forgiveness.

Rural, pre-internet times, I had friends going to Wednesday night AWANAS at the Baptist church instead. I went along one night. Preacher showed up for a short sermon essentially promising all of us kids hellfire and damnation, forgiveness not possible.

Depending on what you were hit with as a kid, the latter could have you internalizing that thought process.