When i first became Christian, i too strongly leaned to Calvinism but the more i learned, the less plausible it became to me. I think Calvin acted in good faith but the period he lived in must be taken into account. Popes were dominant politically and spiritually, frequent excommunication was a serious threat to literally everyone in Europe, convents were often brothels too etc. Much of Calvin's reasoning seems to be a very understandable reaction to a politicised, religious hierarchy which sought earthly power, not the doing of God's will. However, it seems most ordinary people of the time probably were genuine believers.
I'm fully aware God deciding to save us is purely His choice, we obviously can't do anything to merit it, however, i really disagree with many Calvinist interpretations of Scripture. Definitely don't agree Romans 9 supports Calvinism without cherry picking either, Mike Winger does a good breakdown on why not in this video:
Non-Calvinist Interpretation of Romans 9
God choosing Jacob over Esau isn't supportive of Calvinism, as i said earlier God is omniscient. Time and space are His creations, He is outside of them, and KNOWS all, which fits in well with his prenatal choice of Jacob over Esau. I'm Christian, not religious at all, first century style Christianity would float my boat for sure tho.
