
What he's trying to do here is provide arguments for and against the existence of God. But he doesn't realize that he's inadvertently arguing that the earth is a prison planet.
He proves that there must be an immaterial first cause to the universe through multiple causal arguments. So something supernatural must exist.
To show the other side and argue against the existence of God, he shows that natural selection is a brutal competition where there was billions of years of suffering, with entire species getting wiped out. Meaningless suffering.
What he doesn't consider, but actually reconciles all his arguments, is that there is a God but this God is not loving. Instead, this God is at best indifferent and at worst malevolent.