If God creates all things, then one cannot escape the fact that he creates evil. The Christian response has always been that God creates only good, but becasue of free agency, good can morph into evil. But if one postulates that some things are eternal (uncreated), then evil becomes a force that contends with God.
The book of Job shows God and Satan in an adversarial relationship, but occupying areas common to both. This is one reason I believe it to be an allegorical text and not historic.
I believe some things are eternal -- as eternal as God, Himself. Only in our present world are there beginnings and endings. To think of God as being the ONLY thing existing for trillions and trillions of years is unthinkable. What did He do? The Cosmos is full of eternal things. Even this Universe had a beginning. But who's to say that there aren't trillions of other "universes" out there beyond our present one?
One ancient writing really impressed me when I first heard about it from a professor of ancient scripture. It came from a non-canonical writing and it stated: "Everything is a system in the midst of like systems." God is eternal and His creations are eternal. If there's one atom, you can bet there's another. If there's a planet, solar system, galaxy or yes, even universe, you can bet there are others.
Jesus said to the Father regarding the Twelve: "...that they may be ONE even as WE are ONE." Thus when we speak of "God," are we talking about one or many? If God is a plural term (Elohim, as in Genesis), we can understand the term, "Man has become as one of us, knowing good from evil." Thus God can be a plural singular, just as "family" and "quorum" are plural singulars. It's in the Bible, and most of the religionists have missed it.
God said to Isaiah (Chapter 44) that beside Him there was no God. Yet we know that Jesus was divine, and that He was God. Psalms 110:1-2 states: "The LORD saith unto my Lord, sit thou at my right hand til thine enemies become thy footstool." Who was David's Lord? Jehovah! Thus, the Father was speaking to Jehovah, later known as Jesus, the Mediator between God and Man. When Jehovah has finished His work, He will present it back to the Father, glorified and redeemed.