Welcome to EvC tuffers, I hope my little opinion on all this will help.
To me, your argumentation looks pretty much like the fallacy of denying the antecedent, which would go like this:
1. If the genesis account of creation is accurate, then the Christian God is real.
2. The genesis account of creation is no accurate
3. Therefore, the christian God is not real
Now, I'm not an expert on argumentation, fallacies, etc. so I may be wrong. But if this is indeed what you are argumentating for, it is effectively a logical fallacy.
There are a couple of ways to show that theistic evotuionism is not a rational position, but this is not one of them, in my opinion.
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