Read this whole answer carefully if you are sincerely seeking resolution to your frustration. I am not saying that with condescension. I anticipated this question and answered it in my post you quoted when I said this:
"It could then be rightly asked 'well then could God have not provided a precise set of circumstances that would be those which are necessary to win the soul of every person?',
and the answer would be no. For some people, there is no such set of circumstances that would be sufficient for them to freely receive the salvation of Christ by the Holy Spirit's testimony. This is affirmed doubly in the Scriptures. First, in
Daniel 12:10 concerning the course through to the end times Jesus says: "Many will be purified, made spotless and refined, but the wicked will continue to be wicked. None of the wicked will understand, but those who are wise will understand." Again, concerning God's providence Paul says in
Romans 9:22: "What if God, although choosing to show his wrath and make his power known, bore with great patience the objects of his wrath—prepared for destruction?"
It may also seem confusing to think that God has among His human creation "objects of wrath" which He prepares for destruction, until you comprehend these points and Scriptures collectively. There are some souls which God would create that will freely reject Him under any and all circumstances, but are still necessary in the grand scheme of world history to play a role in drawing all those who will be freely saved into that salvation. God Himself illustrates this wonderfully in His statement to Pharaoh in
Exodus 9:15-16: "For by now I could have stretched out my hand and struck you and your people with a plague that would have wiped you off the earth. But I have raised you up for this very purpose, that I might show you my power and that my name might be proclaimed in all the earth."
See Acts 17:26-27,
Genesis 50:20,
Jeremiah 25:8-14and
Judges 14:4 for more Scriptural examples on the providence of God and how it works."
Acts 17:26-27,
Hebrews 9:26,
Galatians 4:4-5, among other Scriptures, make clear the our settings in time and location are established for the exclusive purpose of preparing us to receive the Gospel. Combining this with the content of my answer in original post, and my answer to point one, it is clear that God had the best world in mind in terms of bringing the largest number of souls
freely to salvation.
It seems your complaint is more concerning the utility, so to speak, of the mass quantities of the unsaved and their allowance into existence despite God's foreknowledge of their inevitable condemnation, more so than a problem ith this point being ultimately true. Regardless, it is clear that more people will be unsaved than saved (Matthew 7:14), and I would find it a bizarre complaint that this point
is true (which Scripturally, it is clear that it is) because it is the only resolution that make's man inevitably responsible for his own condemnation. Under all alternatives, God is not allowing those foreknown to be unsaved to exist, but is actually causing them to be unsaved.
So based on the content already provided in my answer, your complaint seems to be summarized in the idea that God is showing partiality by creating a soul He foreknew would be condemned if they existed for the purpose of playing a role in leading another soul to salvation.
There are two points to consider in answering this question:
1. To be partial is to show special favour towards someone or something. God is not being partial in the grace He extends towards any individual at any time in any place, but rather places us each in our contexts with the exclusive purpose of maximizing the number of souls that freely accept the salvation found through Christ alone (again, Acts 17:26-27). The circumstances vary because the individuals placed in them do, and thus their courses are plotted according to how they will affect other courses and respond to their own. That being said, those who accept salvation and those who reject it do so freely, and those who reject it would do so under any circumstances (Daniel 12:10, Revelations 9:20). Thus, God would be partial if He did not create the wicked who will be self-condemned rather than create them, as He would be favouring souls that would freely choose wickedness over souls that would freely choose righteousness, thereby precluding the one who would choose rightly from enjoying the eternal knowledge of God on account of a reprobate individual who would incessantly reject Him.
2. This question also neglects to consider that the inadvertent benefit of this self-condemned person’s life will likely extend beyond the salvation of one individual. The person who finds themselves lead to Christ by the direct or indirect causes of this person’s existence will, in many cases, have the broad opportunity to intentionally direct others to the salvation found in Him, resulting in potentially dozens, to hundreds, or even thousands more saved souls. To reemphasize the first point, partiality would be the cause for
not creating the self-condemned person at so large an expense, which would be true even if it were only for the one, which is unlikely.
In summation, God being unwilling to create the self-condemned to spare the freely saved would be like a man who refuses to spare the lives of his family in defending them from an armed attacker, who has had many warnings not to enter his house and threaten them, because he does not want to choose between defending their lives and taking the assailant’s. The devil has come to steal, kill and destroy, but Christ has come to destroy the devil’s work (John 10:10, 1 John 3:8).
You are free to respond to God's initiative, and if you ever will, you are placed in a time and location that you will freely do so. Again, this indicates that all unsaved are not salvageable under any circumstances. God's power does not entail the logically impossible, such as creating a rock too heavy for Himself to lift, or being able to force someone to freely choose something they never would.
