Question

Hello Rabbi, until now I had assumed that the world is very complex, which points to an even more complex designer, and such a complex designer would not create such a world without a reason, which leads me to the necessity of religion existing. (From there to Judaism is a different move, less directly connected.)
A claim came up in a conversation with someone that God could also be very limited in His abilities, and could create only very "raw" things, and perhaps He only got as far as the singular point and activated it. I answered that even if He created only that, He would still have had to create the potential complexity. His reply was that in theory that sounds right, but as proof he brought up the idea of AI, which, according to him, was initially developed by humans but then developed and improved itself in ways the programmers could not foresee. And so, it is possible that God gave the universe an initial push, like the programmers who gave AI its initial push, and from there everything runs on its own. That would mean that God need not be complex, and there is no necessity for religion to exist either. I didn't have an answer to that.
What can one answer to this, or perhaps my basic outlook and line of reasoning are mistaken from the outset?
Thank you very much