So, what’s your theory?
You must have one.
What is it?
How old is the Universe?
Is it expanding?
Was there a beginning?
What logical reasoning led you to a conclusion that an omnipotent and omniscient God, by those terms outside of time, space, and the ability to define with reason, doesn’t exist when the tools to determine that don’t exist? Or, in you contention they do exist, what are they and what are the steps?
It’s worth discussing.
Until somebody comes up with a reason to believe anything else, I will believe that the universe is basically eternal like God, that the various creation stories you read in ancient literature basically refer to the creation of our own living world and local space environment, that the universe is basically rational, and that classical physics rules it.