I was born with a sinful nature, through no choice of my own.
"Original Sin" is a false doctrine and always has been.
Christ's death on the cross takes care of that for every last man woman and child that has or will ever exist (Romans 5). No one will ever be punished for anything other than their own sin.
Further, God Himself says that people are not punished for the sins of their fathers and in fact that He hates the whole idea...
Jeremiah 31:28 And it shall come to pass, that as I have watched over them to pluck up, to break down, to throw down, to destroy, and to afflict, so I will watch over them to build and to plant, says the LORD. 29 In those days they shall say no more:
‘ The fathers have eaten sour grapes,
And the children’s teeth are set on edge.’
30 But every one shall die for his own iniquity; every man who eats the sour grapes, his teeth shall be set on edge.
Ezekiel 18:1 The word of the LORD came to me again, saying, 2 “What do you mean when you use this proverb concerning the land of Israel, saying:
‘ The fathers have eaten sour grapes,
And the children’s teeth are set on edge’?
3 “As I live,” says the Lord GOD, “you shall no longer use this proverb in Israel.
If I don't trust Christ, I'll be rightly punished with eternal death because of the sin
that dwells in me.
You will be punished for the sins you have chosen to commit. Those are the only one's that God can justly punish.
I can try until I'm blue in the face, but I cannot act righteously
in my flesh.
This is false. If the Samaritan (an unbeliever) could act rightly, so can you.
That isn't to say you could be righteous enough to deserve heaven. Your nature does prevent that, but once again, that much of the problem was taken care of at the cross. People are not sent to Hell for the sins of their fathers but for their very own sin.
Resting in Him,
Clete