Or is it rather that you refuse to allow actual scripturas to balance others out to get a right interpretation. When God says no purpose of God is thwarted it means a purpose of a certain type and sort....this must have been what God meant in your Job 42 verse for a great many verses show God's will is not always done. eg of a certain type. NO PURPOSE OF GOD will be thrawted when it comes to when God says for absolute sure that a judgement will come as in Israel told their going into captivity.
But YOU ARE being inconsistent . You've said here openly that when God gives an instruction to do something that it is his will. That's a good answer. Now when it seems it puts your Calvinism in jeopardy you quickly jump over to the other side of the fence. That's an incredibly sad thing for you to do. I trust though that all other readers however can see your duplicity and can at least see what Calvinism does. Still not too late to change your mind.