Seriously atheists, WHERE did the universe come from?

Multiple questions, none of which atheism addresses. The question is also meaningless. Any "where" for lack of a better term, is outside the realm of observable reality. It may as well not exist, even if it does. Metaphysics is an essentially useless discipline that cannot address ANY solid question beyond "I think, therefore I am." But, fine. Entertain your pointless solipsism. It can come from wherever or from whomever your imagination can conceive, but be warned that any claim or idea you have is just as valid as anyone else's.