The universe DID NOT begin. I have provided the logic as to how you can know this yourself. It involves logical metaphysics that is outside the normal thinking of a physicist who is immersed in practical math.
Your logic makes sense to you. But as I have said before, your interpretation of logical metaphysics is limited by the ability of your personal fallible human mind to grasp these concepts. We all have limits in our ability to understand; we err when we come to conclusions in isolation and do not admit the possibility that our individual interpretations may be flawed.
I offer you two scripture verses, which I imagine you will probably dismiss with self-affirming alternative explanations, but here they are anyway. The literal reading of the Greek in both is “before eternal times”:
Titus 1:1-4 Paul, a slave of God and apostle of Jesus Christ for the sake of the faith of God’s chosen ones and the recognition of religious truth, in the hope of eternal life that God, who does not lie, promised
before time began, who indeed at the proper time revealed his word in the proclamation with which I was entrusted by the command of God our savior, to Titus, my true child in our common faith: grace and peace from God the Father and Christ Jesus our savior.
2 Timothy 1:9-10 He saved us and called us to a holy life, not according to our works but according to his own design and the grace bestowed on us in Christ Jesus
before time began, but now made manifest through the appearance of our savior Christ Jesus, who destroyed death and brought life and immortality to light through the gospel.
There is an illustration normally used when determining whether someone has an optomistic or pessimistic point of view. Put water in a glass to the halfway point, and ask whether the glass is half-full or half-empty.
But there is a different way of looking at this illustration: the glass is too large.
I suggest to you that when you visualize an eternally existing universe upon which your god is codependent, your god is too small.
Theopholis of Antioch, writing in a work called “To Autolycus” in AD 181, had this to say:
"Plato and those of his school do indeed acknowledge that God is unbegotten, and that He is the Father and Creator of all things; but then they posit that matter as well as God is uncreated, and maintain that matter is coeval with God. But if God is uncreated and matter is uncreated, then, according to the Platonists God is no longer the Creator of all things; nor, insofar as their opinion holds, is the monarchy of God established.
“Furthermore, inasmuch as God is uncreated, He is also unchangeable; so also, if matter were uncreated, it would be unchangeable and equal to God; for that which is created is alterable and changeable, while that which is uncreated is unalterable and unchangeable. And what great thing were it, if God made the world out of existing matter? Even a human artist, when he obtains material from someone, makes of it whatever he pleases. But the power of God is made evident in this, that He makes out of what does not exist whatever He pleases; and the giving of life and movement belongs to none other, but to God alone.”
There are plenty of other citations I can quote from the Early Church Fathers which make the same point. God is greater than the universe. God created the universe out of nothing, and is not codependent upon any eternally existing thing, not even time itself.
So what we have here is NOT any high-level “logical metaphysics” after all. The theories you propose are merely a repackaging of Plato and other pre-Christian philosophy. This Platonic metaphysics was aligned with Greek mythology, in which an eternally existing universe known as Chaos spawned its absolute opposite, a primal creator-god who organized it and spawned a pantheon of god-descendants.
Your logical metaphysics has already been challenged and found fatally flawed by such minds as Aristides of Athens, Justin Martyr, Tatian the Syrian, Irenaeus, Tertullian, Hippolytus of Rome, Origen, Lactantius, Athanasius, and others. I can quote them all if you like. Their statements on God and creation are in agreement. God created everything out of nothing.
Any god who is deemed to be dependent upon and create out of eternally co-existing matter is something less than the One Supreme Omnipotent God we know. Your god is too small.