You're on the verge of seeing it from our point of view. You think it's sciences job to answer your questions about the existence of God. It isn't. The burden of proof isn't on science but on the claimant. Your religion (religion in general) claims there is God/Gods yet offers nothing for evidence to back up this claim. Your belief is due to your indoctrination as a child. Basically all of ours were. You'd have laughed at the notion as an adult if you'd never have heard of it and someone started telling you about talking snakes and boats carrying every animal and a man that walked on water etc. etc.

Because we aren't sure how the big bang began or how the first cell got going, abiogenesis, doesn't mean that we can insert God and leave it at that. It took me a long time for me to call myself an atheist. The word had so many negative connotations associated with it. It's just a word with no more power than a black cat crossing your path, unless of course you live in the South and your parents will disown you or whatever.