You're contradicting yourself.We don't know where the universe came from and that's ok.
On the one hand, you say 'we don't know'.
On the other hand, you are 100 percent certain there can't be higher any rational agency behind the origin of a mathematically rational and lawfully organized universe.
You don't get to make both those contradicting claims at the same time.
If you really believe nothing exists but inanimate matter and energy, then you are stuck having to explain the miracle of how lawfully organized matter and energy just appeared out of nothing