You have no theory not even a partial theory. If you are referring to the Miller-Urey experiment, the building blocks are not the issue. Just as the existence of cement does not explain a brick building without intelligence.Materialism has a partial explanation for life and a complete explanation for DNA: all the necessary components for DNA can form chemically and have been shown to form chemically.
There are no physical laws for intelligence and the term complexity is reserved for physical structures and does not apply to spirit. Given this, our starting point is perfectly valid.Unfortunately Intelligent Design cannot explain how intelligence arrived on the planet. You assume the pre-existence of a complex phenomenon like intelligence and then use it to 'explain' other complex phenomena. Your explanation of complexity starts by assuming the presence of ... complexity.
Explaining X by assuming you start with X is a most unsatisfactory explanation. When materialism explains the presence of, say, purines, it does not start by assuming the presence of purines.
ID assumes what it claims to explain, and hence fails as an explanation.