Then what exactly is wrong with his methodology?
First, the decay chain is well known and the decay rates are well known. He eliminated all possibilities because there are only a few that were possible. That lead to the primordial conclusion.
Second, he offered a simple test to refute his work. And with today's technology that should be easy. No one has done it.
Third, the flood poof work also refutes evolution and billions of years.
Fourth, he documented the censorship he endured.
Have you even read his book?
No.
So you are using circular reasoning.
All reasoning for evolution and billions of years is circular reasoning and not science.
This is it in a nutshell.
We know evolution and billions of years are true (conclusion is the assumption) and since we know evolution and billions of years are true (conclusion is the assumption) and such and such exists, it must have evolved because we know evolution and billions of years are true (restating the assumption as the conclusion).
Furthermore, any evidence that contradicts evolution and billions of years must be false because we know evolution and billions of years are true.