The Flood was a terrible judgment of God on the world. It showed how serious human sin is, but also put on display his profound grace when he kept Noah and his family alive. After the flood, we are not essentially better; but we live with God's assurance that he will not allow sin to spiral out of control again.
Because of these roles of Adam and Eve, it is difficult to speak of them as individuals, without speaking more generally about human beings. But that is the point of the Biblical narrative in Gen 1 through 3: in Adam and Eve we see our ancestors and therefore, by representation and example, ourselves.