Here's the thing, we're going to forever go in logic circles (an endless loop if you will) about the unvierse's begining, because if you say that things cannot be created uncaused, then god needs a cause, and since god is by definition omnipotent, and you state that things can only become/create less complex things, there can be no cause - which makes your logic contradictory, and no god more likely. But then, the other alternative is that the universe was created by a natural process - what caused this process? why another one, and so on and so forth, such that I believe you can only see it as an infinite regresion of causes.

Kind of reminds me of an old myth that the world rested on the back of four giant elephants on a giant turtle. When asked what the turtle rested on, a head priest would reply 'it's turtles all the way down'

I have yet to see any evidence that an infinite regression of events is less plausable then an omnipotent being.