If God’s judgment is unjust then we are forced to conclude that Calvin’s theology is incorrect because God is incapable of being unjust.
God has declared, before John Calvin developed his own theories, that man is indeed capable of being righteous and that he does not hold the sins of the fathers against the sons.
Ezekiel 18:3-9
“As I live,” says the Lord God, “you shall no longer use this proverb in Israel.
4 “Behold, all souls are Mine;
The soul of the father
As well as the soul of the son is Mine;
The soul who sins shall die.
5 But if a man is just
And does what is lawful and right;
6 If he has not eaten [a]on the mountains,
Nor lifted up his eyes to the idols of the house of Israel,
Nor defiled his neighbor’s wife,
Nor approached a woman during her impurity;
7 If he has not oppressed anyone,
But has restored to the debtor his pledge;
Has robbed no one by violence,
But has given his bread to the hungry
And covered the naked with clothing;
8 If he has not exacted usury
Nor taken any increase,
But has withdrawn his hand from iniquity
And executed true judgment between man and man;
9 If he has walked in My statutes
And kept My judgments faithfully—
He is just;
He shall surely live!”
Says the Lord God."
Jesus called Abel "righteous." If Adam's sin was imputed to Abel through "concupiscence" as Augustine put it, then apparently, he didn't give Jesus the memo.
Matthew 23:35
"35 that on you may come all the righteous blood shed on the earth, from the blood of righteous Abel to the blood of Zechariah, son of Berechiah, whom you murdered between the temple and the altar."
Total Depravity is based on the erroneous doctrine of original sin, a doctrine which cannot be found in the scriptures. God's righteousness exceeds the righteousness of men. He is fair and just. Total depravity asserts that God is arbitrary and picks and chooses based not on his foreknowledge but on some undefined criteria that has nothing at all to do with what men believe or do. It's slander against God.
“Yet you say, ‘Why should the son not bear the guilt of the father?’ Because the son has done what is lawful and right, and has kept all My statutes and observed them, he shall surely live. 20 The soul who sins shall die.
The son shall not bear the guilt of the father, nor the father bear the guilt of the son. The righteousness of the righteous shall be upon himself, and the wickedness of the wicked shall be upon himself."