God is basically a placeholder for something we don’t understand yet. It should have gone away when we understood how things like sun rises and such worked, but most humans can’t handle the thought that death is final. Exploiting peoples existential crises about death is a great way to manipulate the population for power and wealth.
While there’s no solid answer for what existed before the big bang and what caused it to happen, there’s no reason for God to be the answer.
At any rate, even if there was a higher level being that created the universe, to think they actually care about what humans do with their lives is just pure hubris.