There is no verse in the entire Bible that as much as implies that Adam was created a sinner. After God created Adam and Eve, he saw that everything he made “was very good.” You are essentially calling the sinful nature very good, in which case, we don’t need a saviour and sim is meaningless. Even worse, you’re implying that the sinful nature is made in the image of God, which means that God has a sinful nature. Utter blasphemy.
Adam wasn’t created a sinner, he was created with the ability to choose between having God as his God or having self as god. Adam (and Eve) rebelled against God because they were deceived and and stopped trusting what God has said was truth. He chose self as god and that is why he became a sinner. That is why God cursed the ground, increased the pain of childbearing, and kicked them out of the Garden.
You won't find a passage of Scripture in the Old Testament that God is three Persons. That theology was discerned AFTER the Advent of the Son. So, with regard to Adam's creation there are several Scripture that address his fallen nature which is why he sinned and disobeyed God. Sin comes from sinner. Adam sinned proving that he was a sinner BEFORE the act of disobedience.
AGAIN, the word 'good' used to describe God calling His creative acts 'good' means 'to specifications,' or 'good enough.' You want to give the word a moral meaning and it doesn't have anything to do with morality. That word is elsewhere in Scripture but not here where God says 'and everything was very good.'
The 'herb bearing seed, the tree yielding seed, the beasts of the earth God called 'good.' Surely by your theology of affixing 'morally goodness to a seed or seeds or beasts of the earth cannot be seen as sound doctrine. There is no morals where seed of herbs and trees and beasts of the field cannot be moral. Besides, the serpent is a beast of the field. Are you sure you want to apply 'good' in a moral sense to the serpent? So, your understanding that God calling the results of His various acts of creation as morally 'good' falls apart.
Now the serpent was more subtil than any
beast of the field which the LORD God had made. Gen. 3:1. The serpent is not 'morally good' as ypou say, but he was made good 'to specifications' and 'good enough.'
And the LORD God commanded the man, saying, Of every tree of the garden thou mayest freely eat: 17 But of the tree of the knowledge of good and evil,
THOU SHALT NOT eat of it: for in the day that thou eatest thereof thou shalt surely die. Gen. 2:16–17.
The 'thou shalt not takes us forward to the Ten Commandments which its mere existence SHOWS US SINNERS before any act on our part of sin.
THOU SHALT NOT have other gods before me....
THOU SHALT NOT take the name of the LORD your God in vain....
THOU SHALT NOT bear false witness and the others, as Paul described,
SHOWS US WE ARE SINNERS.
7 What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet. 8
But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. For without the law sin was dead. 9 For I was alive without the law once:
but when the commandment came, sin revived, and I died. 10 And the commandment, which was ordained to life, I found to be unto death. 11
For sin, taking occasion by the commandment, deceived me, and by it slew me. Rom. 7:7–11.
The commandment in the garden of Eden PROVES the commandment shows Adam was a sinner BEFORE he disobeyed.
Adam sinned BECAUSE he was a sinner. He is NOT a sinner because he sinned.