From the time of Hume to the present day, the Argument of Design has been repeatedly shown to be nonsensical. You may be unaware of the fallacy of
Affirming the Consequent, and that's why people like Stephen Meyer and Michael Behe can sell so many books. However, that's no excuse for dragging this argument out after it's been refuted so many times.
For the millionth time, you can't use your conclusion as the validation for your major premise. That is, using "only intelligent design could account for the such-and-such natural phenomenon" as your major premise assumes what you're trying to prove. Since Darwin, humans have discovered many natural mechanisms that could account for such-and-such natural phenomenon that don't involve the intentional activity of an intelligent designer. Even if logic hadn't already gutted the Argument from Design, what we've discovered about the biosphere would have made it obsolete.