Any ideas of simply renegotiating the hard-won compromises Iran gave us as if it was some sleazy real estate deal of Trumpian standards is pure folly. We've turned our backs on our allies and broken our word and bond and in the process, incensed an abused nation that is the Iranian people.
We may not agree with their government, but it should be remembered that international relations are not won and lost in short-term, one-shot "deals" like down at the used car lot or at some gaudy Trump property management office.
The process is, more often than not, moved forward in steps, some of which are not easy for either side. Academics refer to international treaties and agreements as an iterative process with the eyes on the long term prize. That requires a bit of vision and not that of the myopic kind.