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?
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