God created himself. is that hard to believe? Maybe not.
Some god to drink some drug juices extracted from mexican cactus to become god, Nubians themselves says and according to history perform some sun dance to transcend and become God.
God is so extremely much greater than we are, that if there was something that did a thing like creating Him, we couldn't understand it as creating. We wouldn't be able to understand it at all. The closest we can come is to say that God always was, is now, and always will be.

In other words. Putting a God in there doesn't solve anything. We can skip a step and say the universe has always been there and so on.
"I don't understand it, therefor God" is not an answer to problems in science.
If we used that we would still be living in caves
"How did that thing make a fire?" "God did it" " "ok"