Your respecter of persons thing needs thought through. You're not really understanding what it means.
On the contrary, it is actually the God of Holy Scriptures. You're only looking at the facet you like, and as many others cringe and buck when God does as He wills. Romans 9? Don't reply against the Potter, clay.
Consider:
In Genesis 12 He picked Abram of all people to do His will. Sovereignty in action. Or is this Him being a respecter of persons? I say it is grace and Sovereignty. According to your words, you see this as a respecter of persons, when He chooses according to His will.
He picked David as King above all others. Sovereignty in action. Or respecter of persons as He chose him above all others?
He came to die for the sins of His people and save them from such in Matthew. Ditto.
Anyone could construe these passages to mean He is a respecter of persons.
God has mercy on whom He wills, and compassion on whom He wills. And whom He wills, he hardens. And He is just in doing so.
Look at the whole counsel of God instead of proof-texting to prove a point.
There's a context for this respecter of persons verse. I think it means He doesn't show favor to persons because of the person themselves. Thus, all are on the same playing field per se. He does however, according to the Bible, choose those He wills to choose. Therefore, your premise that in your above quote, this is not the God of Scripture is in error.
Do you then deny that Jesus said all who are hungry and thirsty may come? That God is not wanting any to perish but for all to come to repentance? If you believe In Calvin's view of God, then you would also believe in limited atonement where Christ only died for some.
All through the NT it talks about belief. Believe on the Lord Jesus and you shall be saved.
If God created some men for heaven and some for hell, then how do you reconcile the fact that God originally created hell NOT for humans but for the devil and his angels?
When we look at the God of Scriptures, we realize that he doesn't just love, he IS love. I'm sorry but this isn't even up for debate. Man has free will and this does not negate God's sovereignty.
Those men whom God picked as you mentioned, this has nothing to do with their eternal destiny. Yes, God chooses men to serve his purpose on earth. But what does this have to do with God creating some men for heaven and the rest for hell before the foundation of the world which Calvin taught?
As for God hardening some, He hardens those hearts that are already closed. Those who resist Him and His Son. God never hardens a heart that is open and receptive. Pharaoh's heart was already closed and God gave him over to the desires of his heart.