My argument is that Prabhupada told a 'snake is a rope' story to his disciples.

The case of Jaya and Vijaya has absolutely nothing to do with living entities origin. They were cursed as part of Lord's lila. They did not develop a desire to leave the Lord.

As I said, there is zero shastric support for the Vaikuntha origin theory. Every time people point it out to the sleepervadis they start bringing the 'aparadha' argument. Those who criticize your absurd theories are actually doing you a favor. Prabhpada had the right to tell such snake-rope stories to his disciples, but they do not change the GV siddhanta.

At one point in Iskcon history GBC decided by a close vote that the origin of all jivas is in Krsna and Vishnu personal leela. Since that time Iskcon myth makers are busy concocting theories to prove this was the absolute truth. Good luck!