The WCF is merely restating Scripture.
Who are you?
Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will? Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus? Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour?" -- Romans 9:18-21"Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
You responded: The WCF is merely restating Scripture. Romans 9:18-21
Romans 9-11 is clearly talking about nations, contrasting the Jews and the Gentiles. God calls which nation that He wills, in whichever order that He wills, granting that the Jews were HIS choice, BEFORE Israel could even merit it. NO ONE can question His choices for calling first the Jews, and then the Gentiles.
In Romans 11, the Scriptures tell us the reason why the Jews fell was THEIR disbelief (NOT God "making" them do it) - AND the Word states that IF they believe AGAIN, they can be reinstated as part of the olive tree. The choice is upon men, not God's intent on creating evil men. God is not the author of sin.
God desires all men to be saved. That all men are not is because men CHOOSE not to believe. See Romans 11. This is all over the place in Scriptures!
You are again misappropriating Scriptures down to the individual level. This says nothing about God reprobating individuals before their demerits.
Regards