No one is requiring the US to remove sanctions like you claim, for example, and even China and Russia are surprised by the Iranians attitude.
Iran came to Vienna “with proposals that walked back anything – any of the compromises Iran had floated here in the six rounds of talks, pocket all of the compromises that others, and the US in particular, had made, and then asked for more”, the senior official was quoted saying by Reuters.
He said it was not clear when the talks would resume, and that Washington was “preparing for a world in which there is no return to the JCPOA,” a reference to the deal’s official name, the Joint Comprehensive Plan of Action.
Russia and China “also were quite taken aback by the degree to which Iran had walked back its own compromises and then doubled down on the requests that it (made),” he said. “They do share a sense of disappointment, to put it diplomatically.”
He said more sanctions would likely come if Washington concludes that Iran had killed the negotiations.
https://www.timesofisrael.com/us-says-wont-let-iran-slow-walk-talks-is-preparing-for-a-world-without-jcpoa/?utm_source=The+Daily+Edition&utm_campaign=daily-edition-2021-12-05&utm_medium=email
Basically your promoting the Iranian view of the JCPOA and sanctions.
Iran repeated its claim Sunday that the United States’ refusal to lift all sanctions on Tehran was the main obstacle to a potential nuclear deal.
“It is now clear that Washington’s reluctance to give up sanctions altogether is the main challenge to the progress of the talks,” the unnamed Iranian official was quoted as saying by Iran’s Tasnim news agency, according to Reuters.
“We believe that a deal is within reach if the US government gives up its campaign of maximum pressure and the European parties show serious flexibility and political will in the talks,” the official said.
https://www.timesofisrael.com/iran-says-us-refusal-to-remove-sanctions-is-main-obstacle-to-nuclear-deal/
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