The OT was written by keen monotheists. Everything that occurred was due to God, the good and the bad. Furthermore, The cultural context within which they were written were vastly different; even the genres evolved over such a long period. For myself, the concepts of original sin and the exodus never did sit well with me. The worst part about the exodus was God hardening the pharaoh's heart. It implies that had he not, the pharaoh would have complied immediately. However, the exodus is a conflict myth, a genre or literary device. In the exodus, the pharaoh represents a foreign god; a god that Yahweh defeats in a cosmic battle via the misery of this god's people - the Egyptians. As to Genesis, it too is another genre - it is etiological, it explains why agriculture was so difficult and our own mortality.
In the second creation myth (Genesis 2), which is the oldest version, there was no sin (the honor of the first sin belongs solely to Cain), there was no punishment in the garden. Adam and Eve were created to till the land. They were cast out of the garden to do the job they were made for and to avoid them eating from the tree of life and gaining immortality. This tale explains why we don't live forever. Furthermore, their life was so bound up in agriculture that their metaphors reflect this way of life. Creation itself is one agricultural metaphor, but this myth also explains the burden and hardship of agriculture - barren lands.
Eating the fruit of good and evil (by the way, this saying is the same as our "A to Z") represents their maturation. The first thing they notice is their nudity, their budding sexuality. There is no curse of pain in childbirth, simply an explanation that it is painful. The only thing cursed in this instance is the serpent. At its core, this tale it explains why things are the way they are. For example, pain in childbirth, mortality, our fear of snakes, the hardship of agriculture, and so on.
I always find myself wondering why we don't give the ancient Hebrews credit for having an imagination and telling stories that spoke to the mysteries of life. When we speak of Native religions, we rarely assume that they take it literally and appreciate the metaphors. Why must the Hebrews be any different?