Complex things are improbable as to coming about by chance.
This is what I was referring to. This is a Creationist argument, and one that has some merit. The flaw of course, is what he ponts out: that if human life coming about without an intelligent designer is hard to believe, then how much more so the infinitely complex god?
Of course the response to this, as you have stated and as no doubt most creationists would agree, is that god has always existed. However there is no evidence of this, no mechanism suggested through which this is possible, no hypothesis put forward to test the validity of the claim. If this is the nature of god, he has not chosen to make anythng else with this nature, as everything we have ever observed has had a beginning and has had or will have an end. There is no way to argue against an invisible god that has always existed, just as there is no way to argue against a great many things that most likely don't exist (invisible unicorns, etc.).