Many people believe that the universe was created by a creator who was omniscient, omnipresent and omnipotent.
I do not believe this, but many people do, so let us take this as an hypothesis and see where it goes.
Such a creator would have had to had a perfect understanding of each alternate universe that he declined to create. The creator would understand the complete history of all beings and objects down to the minutest quantum detail. This is required by the creator's omniscience. The creator would consider all universes which are internally consistent, that is all universes that seem to obey their own laws without flaw. The hypothetical creatures of these internally consistent universes would have no way of determining that they were in an alternate, not chosen for creation universe. This is because of the perfection of the creator's understanding, or if you want to put it that way, the perfection of the creator's "simulation" of alternate universes in the creator's perfect thought.
So the bottom line: you may believe that God created a perfect Universe, but you have no way of knowing that you are in the perfect Universe that God created. For all you know, you are a part of a alternate turd universe that God declined to create.
Of course it is absurd, but refute it if you can, I won't. Many would argue it no more absurd that the original hypothesis.