Is nihilism the logical extreme of atheism?

[genkaus]

The singularity is perfectly 'good'.

Prove it - tautology does not serve you here.

It is functional in that it brings about a universe.

Not every singularity brings about a universe. So that cannot be ascribed as its function.

God, having produced said singularity, has to be superior to it (see Aquinas).

And here's where you bring in the evidence to show that your god produced the singularity.

So Good is morally superior to the universe, and needs to be perfectly good.

Shoddy equivocation. Even if the rest of your argument held any water, all you've done is establish the singularity as functional and thus your god as more functional. Being morally good never enters the equation.