All aspects of Calvinism have a double aspect whether or not you are willing to admit it is another story. If God could have saved the lost but chose not to for whatever reason they are lost because of his inaction not because they are sinners. You admit that he can save some but for some unknown reason he cannot or will not save all. Under Calvinism the saved are saved because of God and the lost are lost because of God. There is no free will so how can you at heart deny this? You're a fraud and a huckster who pawns off Josef Mengele as the creator of the universe.
It is the same as Adam and Eve in Genesis 3.
GOD: Don't eat of the fruit of that tree or you will die.
What did Adam and Eve do? They did exactly the contrary of what the Lord told them to do. They did eat and they died immediately.
What was the reason that they gave for being disobedient? It is your fault God.
ADAM: The woman whom thou gavest to be with me, she gave me of the tree, and I did eat.
TRANSLATION: If you, God, had not given me the woman, I would not have eaten; therefore, it is your fault God that I did what I did.
EVE: The serpent beguiled me, and I did eat.
TRANSLATION: The serpent that you created, she beguiled me, had you, God, not created this serpent, I would not eaten; therefore, it is your fault God that I did what I did.
GOD: I will provide a way to get you guys out of the mess you got yourselves in. If you follow my way, you will be saved if not you will be lost eternally.
There is no record in the Bible that Adam and Eve ever made it right with the Lord.