When adam sinned and they in him, God had already determined that some of Adams posterity would be vessels of mercy, and some vessels of wrath for their sins.
That is true but that does not mean God made two different types of people and it does not mean God preemptively determining some would be vessels of mercy did not also mean He had determined they would
also have them go through the condition of wrath.
I tried to bring this to your attention much earlier but you've assumed the two conditions are mutually exclusive, that a person destined for mercy CANNOT possibly also go through a period of anything else. They can ONLY be objects of mercy and therefore never be in a state of wrath for even a fraction of a second when that is not the case. God,
knowing that everyone would sin, AND
knowing that He holds a wrathful view of sin, AND
knowing He had also predetermined death would be the consequence for sin, allowed some to go through the experience of sin and death before He made them objects of mercy.
What you've done is like the Christian who quotes God desires all men be saved and imagines that verse defines the totality of God when the fact is God has many co-existing desires. God does desire all men be saved BUT He also desires to mete out the just recompense for sin. These people pit "God is love" against God also being just (and vengeful and conciliatory, and wrathful, etc.). Just because a person is an object of mercy does not mean they were not also subject to the wrath due sin had God not intervened
before they sinned. You think all mentions of "created" and made" reference the origin of creation when that is often not the case. Simon was made Peter when Simon was an adult. Yes, God had already foreordained Simon's entire life but that does not change the fact the change was made at a fixed point in Simon's life. The same is true of Paul. Paul was a conspirator to murder and despite vehemently opposing Christ
murderously God had already ordained Paul for an entirely different purpose and an entirely different life. He changed Paul in Paul's adulthood, and the change was rather violent
(physically, cognitively, emotionally, and spiritually). These same things could be said of most, if not all, of God's people in the Bible. Jacob was a grifter. God broke him (literally and figuratively) and it was due to the breaking and only after being broken that Jacob grasped God's purpose in his life. David was a lying adulterous murder and God dealt with him in decidedly wrathful ways, causing his own sons to rebel against him, killing at least two of his sons, forcing David to confront his own sinfulness to understand God's grace. He made Jonah live inside a great fish for three days.
Your entire position is built on a false dichotomy, and it has proven very difficult for you to examine your own belief objectively. A person can be
both an object of wrath and an object of mercy in one lifetime. That is why Paul used the word "
formerly."
Dispositionally, the saved always were going to get saved BUT they would first become sinners.
Dispositionally the saved are always saved but
experientially they become sinners first.