I don’t know whether there’s a God or not. Nobody does, no matter what they say. I think it’s perfectly possible to explain how the universe came about without bringing God into it, but I don’t know everything, and there may well be a God somewhere, hiding away.
Actually, if he is keeping out of sight, it’s because he’s ashamed of his followers and all the cruelty and ignorance they’re responsible for promoting in his name. If I were him, I’d want nothing to do with them.