Looking for honest answers

So I know many of you do not believe in God, don't answer if you aren't interested in a (sort of) new discussion. I would like to know though. If there wasn't science behind your reasoning for God "not being real", what would another reason be for not believing? I don't want rude answers please. Just started a new Bible study and I was thinking about it. For me personally, I have always believed. Something in me just won't allow me to accept we came from some big explosion in the sky. It just doesn't make sense to me. I really suck at words to put everything out here on writing though so sorry. 😅