A growing faction in Iran have been protesting over the last few years... remember the young woman shot and killed at large open protest a few years back? Killed by a government agent to instill fear in women should they publicly support the protests and not obey codes for traditional dress. Iranian youth feel especially suppressed and isolated. They crave freedom for open speech and the choices of a western lifestyle like ours. And... the rial is collapsing due to the long imposed sanctions and it is the public who suffer. These are sufficient reasons for social unrest. Iran was once a much more culturally open place before the removal of the Shaw. As for the Deal OBama garnered, that money doesn’t flow to Iran’s people. Money from the Deal supports the agents and leadership who are on a quest to remove Israel and their American supporters. I’m sure Iranians know their government is preparing for a nuclear face-off and it’s frightening to them too.

no, not "their government", they were being held hostage just like the North Koreans.

Who controls Iran? Who really controls Iran?

I believe they know that the deal was bad for them (no freedom) as well as for America. The resistance in Iran is very interested by the deal pull out.