Q: Does the argument from order apply to God? (Before it changes again 🙂)
You are right. Both the concept of God and --the more real- universe are quite complex. But they very different kinds to be compared and decide what is more complex of the two. And maybe we don't have to.
From one side, we have Science, which has been advancing by giant steps since its beginnings, much earlier that the time the term has been coined. It represents the Universe.
On the other side, we have philosophy and religion, which are quite cumbersome in their movement. It is clear I think that there no much advancement in either. Aristotle and other ancient philosophers are still discussed today and Christianity, represented by the Bible, is not very different than Mythology and ancient religions. So, this side represents God.
One side walks on a steady ground, based on reality, facts, history, data, and evidence/proofs.
The other one hangs about in our minds and is totally unstable, it has little to do with reality, facts, history, data or evidence/proofs. Its manly based on speculation.
And something very important here: People tend to talk about God as if there's a single kind of God, addressing to Him with a capital, as a stereotype. Yet, the Judeo-Christian God is different from the Islamic God, the gods of the Hindus, etc. This and the fact that each religion believes its God or gods are the unique ones, makes the concept of God even more "fragile".
Re: "How could His existence be less miraculous than the universe?"
I wouldn't use the word "miraculous" for either. I simply can't see any miracle. The world as we know it has not been created at once, with a single action, as a magician produces a rabbit or pigeons out of nothing. It took billions of years to be developed and evolved. And the process is explained in its largest part by Science is. So, where's the miracle? Only a religion like Judeo-Christianity could claim that it was created in 7 days.
Talking about order: I believe there is much more disorder in nature than order. Try to think of things that are ordered, harmonic, symmetrical, etc. Then think about things that are disordered, disharmonic, asymmetrical, etc. You can dot with the least effort, can't you?
We need to have order in our lives. We dislike and hate disorder and randomity. Order means safety. Disorder and randomity means danger.
Re: "I’m not sure how God, being supposedly uncreated, solves the issue."
I'm not sure what is the issue you are referring to exactly. Lack of order?
Re: Robots
Robots are created by man, like billions of other things. Because they look and act like humans, it doesn't mean there's something miraculous or especially admirable or fascinating about them. Mechanical and electric toys looked and behaved like humans much earlier than the invention of robots. Puppets and dolls too were fascinating objects since thousands years ago.
Re: "What is the argument against God's probability?"
I assume that you mean what is the probability that God exists, right?
I also assume that you are referring to the omnipotent, omnipresent and omniscient Judeo-Christian God. Right?
Therefore you are talking about a God who created the Universe in 7 days, about 5- 6,000 years ago. Right?
Well, what could be the probability for the existence of such a God?
(Rhetorical question 😃)