Ex nihilo is the argument that something was created out of nothing.
I wonder if the universe was never created at all, or if the universe created itself (which links in with pantheism which may argue that 'God is the universe'). By never created at all, it doesn't mean the universe doesn't exist, but rather is an automatic manifestation, from a logical world.
Mathematically this could maybe work by re-imagining the concept of zero. Instead of nothing, it is instead two 'polarities'; +∞ and -∞ (but probably here you have to alter the meaning of infinity here to mean 'everything' as ∞-∞ is not necessarily 0), which together are zero, and always have been zero. This could explain why in physics charged atoms/molecules (known as ions) eventually decay until they have stable polarities.
All matter in the universe could also be a combination of polarities.
There is a fundamental problem with this thinking though; logic must have some kind of existence/form (a machine wouldn't work without its engine). There are questions about metaphysical nature of logic itself, which is confusing to talk about because we feel we are already part of a logical world in which we can come up with mathematics/logical axioms.
Additionally this argument doesn't address the dilemma of consciousness; why is it we project consciousness from ourselves and not everyone at the same time (or from no one)? Could there be an intelligent being which chooses who we are born as? If you had a clone who was physically the same as you, would you experience their consciousness too? Perhaps it depends on relative time; according to relativity we may all experience time at a slightly different rate due to factors like our relative velocity (maybe? I'm not qualified enough in physics to answer this.).
There is also the fact (from what has been tested from science so far) that the speed of light is a constant (3x10^8 m/s), which may raise an argument of whether it is a remnant of intelligent design.
This universe could also be one of many universes, not the 'highest' (if one exists), like the popular simulation idea.
Thoughts?
The physicist Pascual Jordan published a hypothesis that the MATTER in the universe was created ex nihilo. His idea was very like the polarities you describe. He believed that matter, being equivalent to energy, was produced by creating an equivalent amount of negative energy. This negative energy was an attribute of the kinetic energy of the expansion of space.
Some argued that amounts of kinetic energy are relative, and that by quantifying the negative energy of space expansion, Jordan did not understand that fact. However, I am sure that a physicist of Jordan's standing understood basic kinetics. I think that his dubious politics may have led to him being underrated. Anyway, the theory of relativity is largely based on some things NOT being relative, such as the speed of light c and, significantly, the rest mass/rest energy of matter particles.
Obviously, Jordan was not a Big Bang theorist. Steady State cosmology, even more than Big Bang cosmology, seems to suggest that there was no Creator, as it implies that the universe always existed in pretty much its present form. I am a dinosaur, so I don't believe in the Big Bang theory. For one thing, to me it implies that since we are looking into the past, the most distant galaxies should be closer together if there was a Big Bang. I once had the opportunity to say that to Sir Patrick Moore (this entire post is just an excuse to name-drop). He pointed out that the most distant objects in the universe have a different appearance to nearer ones. I said that the Big Bang still didn't make sense to me. "Nor me", he replied with a smile. I know that some cosmologists say that the shape of space explains why distant galaxies do not seem closer together. To me that seems like bending the facts to suit the theory but what do I know.
As to logic, I'm not sure that it is an entity that requires creation or even that some kind of universe could not exist without it. As to consciousness, I agree that it is still mysterious. There are theories but none so compelling that most scientists find them convincing. Even if a computer program is created that successfully mimics human thought, I don't think that it would necessarily mean that we understand consciousness. As to universal constants implying intelligent design, I don't follow the necessity but in any case some physicists think that they may change over time.
As to many universes, I currently think that quantum mechanics is consistent with me having my own personal 4D universe, interacting with the 4D universes of every other person and particle in the universe, including those of my own body. After all, even early quantum physicists found that while one particle can be described as moving in 3D space, two interacting particles need two 3D spaces.
I rather liked the idea that the universe is a computer simulation. At least a nine-year-old playing a computer game might be placated by prayer or praise. Sadly, Zohar Ringel and Dmitry Kovrizhi say that they have proved otherwise.
After all that, I still don't discount the idea of a Creator. Ancient Hebrews were aware of the problem of a Creator existing without being created Himself but knew that they had to draw a line somewhere. God told Moses to call him Ehyeh-Asher-Ehyeh, "I Am That I Am". In my logical moments I am an atheist but I pray every day. What else can we do while at the mercy of this awesome universe?