"there are myths all around the world of various gods creating the universe and people."

False! None of those mythical gods share the characteristics I expounded above that arise from scientific cosmology: spaceless, timeless, non-material, immensely powerful, personal free will, self-existing. Are you anti-science?

"Secondly ideas of multiverse use "it did not come into existence, but is self-existing. So you can't prove if it was an entity or the multiverse that created the universe"

False. The unobserved (and probably unobservable) multiverse is still subject to the BGV Theorem, which merely backs the argument up one step. (The multiverse cannot be past eternal according to this theorem.) As a Christian theist, I hope the multiverse theory is true, because it makes God that much bigger and more powerful and smarter. But, right now, it is "multiverse of the gaps" thinking by atheists. I thought atheists were the rational, science-y ones?!?