the garden of eden is just a metaphor for nature and natural instinct, it's basically humans before they became self-aware and were the same as chimps and other animals. everything is bliss because there's no ego or self, animals don't rape and shit like that, they're just adhering to their instincts.
the serpent and the tree of knowledge represent consciousness, which can be seen as either a gift or a curse. If you're an antinatalist like Ron Paul then yeah I guess it's a punishment to come into existence and develop consciousness because this existence is basically a lower dimension of purgatory. By that logic abortion is right and raising a child is wrong