Not to argue for creationism, but this argument sucks. Lead can be produced by supernova, not just through decay of heavier elements. But even that's besides the point, since if you believe some entity created the universe, surely said entity could have created whatever ratio of lead to uranium they wanted. It's not a falsifiable claim, there's really no disproving it, unfortunately.

(Not so fun fact: the environmental impact of leaded gasoline was discovered by trying to estimate the age of the earth using the radio of lead to uranium in uranium deposits, but the pollution from leaded gasoline was throwing the measurements off.)