Ps. not what I personally believe just pointing out the flaw in your logic. The universe doesn't require God exist any more than God requires some higher power above them to exist.
BTW even if God exists it does not mean your version of how the universe came into being is correct. God could just as easily have created the big bang and let the universe unfold. So even with God creating the universe you still have no proof that your version of God is the correct one. Or that the bible is the word of God