The deal was implemented as a resolution to lengthy UN sanctions on Iran because of their enrichment activities and other suspicious related activities. Yes, the US walked from the deal but Iran easily could have continued with reasonable actions to keep the IAEA and UN satisfied. Instead they go back to the exact activities that inspired the UN sanctions in the first place.
Sorry but Iran has no peaceful justification for that massive enrichment capacity, no justification for adding to their 3% surplus, and no justification for enriching beyond 3%. Add in that the next IAEA report is supposed to include evidence of Iran hiding radioactive material. Sure the US rejection of the deal has been a precipitating action but Iran should be held accountable for their choices to escalate politically and in their nuclear program.
As long as Iran complied with the IAEA Nuclear Deal, then there was no need to cancel this whole treaty with them. It was a moronic decision that was designed to then implement a so called "new and much more better deal", just for boasting rights:
IAEA Report Says Iran Continues To Comply With Nuclear Deal:
The fresh IAEA quarterly report, however, found Iran continued to comply with the JCPOA and said its inspectors had been given unfettered access to Iranian nuclear facilities.
"Timely and proactive cooperation by Iran in providing such access facilitates implementation of the additional protocol and enhances confidence," the report stated, referring to the procedure detailing safeguards and tools for verification.
According to the IAEA report, Iran's heavy water stockpile rose from 124.8 tons in February to 125.2 tons as of May 26. That’s still below the 130-ton limit.
Its stock of low-enriched uranium was 174.1 kilograms as of May 20, up from 163.8 kilograms in February, the IAEA found. The limit set out by the JCPOA is 202.8 kilograms.
It added that Iran had not enriched any uranium above the level allowed by the JCPOA.
https://www.rferl.org/a/iaea-report-says-iran-continues-to-comply-with-nuclear-deal/29974795.html
If you have evidence that they did not comply with the deal, please provide it to the IAEA!!