My 2 cents: when I have and read Romans 9 I see it as entirely about
Israel. It starts with Israel and ends about Israel. Where does personal salvation come into play?
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Paul says nothing about personal salvation, he is speaking to and about Israel.
Re-read it as if its being directed to Jews. That the question in verse 19 is from a Jew who has followed the law and expects righteousness based on the promise.
Some I guess push Issac and Esau and their
personal salvation, which scripture (verse 13) does not say. No where in the Bible that I am aware does it say Esau personally was
not credited faithfulness as well. When I read it I see nations.
God bless