Rubio's response to JCPOA in 2015 is prescient https://www.youtube.com/watch?v=-5dQIVh_QT4 . Everything foretold in his speech has happened.

Continued sanctions were a viable answer, the reason they failed is because Biden relaxed them at the beginning of his term, allowing Iran to resume oil sales and he also paid Iran $5B in exchange for hostages.

Everything foretold? Iran is the most dominant in the region, they kicked US out, they possess nukes (or conventional) that can reach the US, and the cost of US stopping them is prohibitive? Wow, Trump had better surrender today then.

I don't think it's fair to say he predicted all of its consequences when he also hoped the next president/congress would cancel it, and they did. Did he foresee that it would only last 3 out of the 10-15 years it was supposed to run, but that would be enough to doom us? Or would it have worked out better if it lasted?

Maybe you are right that the sanctions lift built them into a threat, but it still feels stupid there was an agreement in effect, Trump destroyed it, and 10 years later the best we can hope for is they agree again to give up their biggest lever and with sanctions this time. I don't think that will go well.

Arguably it's a weakness of the US system, or the particular laws in this case, that, whichever of JCPOA or sanctions was best, either can be undone at the next election. Rubio implied that's a strength though.

It is prescient that he predicted a lunatic would possess nuclear weapons and act according to apocalyptic religious beliefs, he just didn't say he would be working for the lunatic.