You'll pardon my saying so, but you have a horribly perverse self-image.
You may not like the Christian doctrine of Original Sin, OWK, but the recognition of the fallen nature of man is what has caused Western Culture to triumph over all others.
Note I said "recognition"...
I know the truth and the truth has set me free. As far as people go I'm a pretty good guy by nature. However, I still fall far short of God's perfection. I still suffer from occasional bouts of greed and envy, selfishness and lust. Like all mankind I was born in sin and continued in it. If not for the saving power of Jesus Christ in my life I would truly be a lost cause. God in His mercy has saved me and made me better, however, that still doesn't change the fact that by nature I, like you and all other men, am evil.