Nothing in your above claim is logical, all I see is three unsubstantiated assumptions.
1. Why do you ASSUME nothing can exist without being created, what created your god?
2. If the universe needed a creator, why do you ASSUME it has to be the god you worship? Why couldn't it be magical invisible spider monkeys that created the universe?
3. Even if the universe needed to be created, why do you ASSUME there is only one creator involved?
All good and appropriate questions.
1. Rearranging created things is what the universe is. Everything is already created. Things come together to form something. This is not creation, it is engineering. To even create a balloon, we need to take other "creations" to work in chorus for what we want. We may say we created the balloon, but in truth, we engineered it.
God is not a creation, but because of him created things exist. Through him. but not by him, IMO. He can create a physical things as easy as we can create a thought. Or a solution to a problem. Physical creation is not the same as spiritual existence.
2. I agree in the content that more than one entity was involved in the creation (beginning). Orthodoxy follows that it was "God", but if it were of the same God Jesus talked of, it would have been spiritually and physically perfect, which it is not. Leads me to believe there was mistake(s) and Jesus taught of the perfect Father who doesn't make mistakes being perfect. The "god" who rued the creation of man, and to destroy him, was not the Father Jesus taught of. Which is why the Jews didn't see the son.
3. Even if we discovered every answer available in the universe, we would still not be able to understand the Father (of all). To see the created universe that we still don't understand in it's imperfection, how could we even try to understand that which is perfect? The flaws allow us to know that there is something above even the creator, that "was" flawed.
Just a point to ponder.