Why is President Trump criticized for leaving the Iran Deal and his 'Maximum Pressure' campaign?
(Inspired by another question which was closed and deleted as a push question.)
According to the Financial Tribune:
The US special envoy for Iran, Robert Malley, said the maximum pressure campaign mounted by the former US president Donald Trump’s administration against Tehran “failed miserably” and “hurt US interests.”
Speaking on a television show hosted by MSNBC journalist Mehdi Hasan, Malley said Iran’s nuclear program accelerated only after the former US president launched his maximum pressure campaign.
Malley is US President Joe Biden’s point man for Iran, tasked with reviving the 2015 nuclear accord that Trump unilaterally abandoned in 2018. He was part of the US negotiating team that worked out the deal in 2015.
On the other hand, leaders in Israel and the UAE have praised President Trump's stance on Iran. According to CNBC:
Leaders in the Middle East threw their weight behind the “maximum pressure” campaign against Iran, just days before U.S. President Joe Biden took office this week.
The United Arab Emirates said it was “absolutely” in favor of continuing to pressure Iran — a policy by the Trump administration aimed at forcing the regime to halt its nuclear activities and cut off support for militants in the Middle East.
Israel’s energy minister said the campaign has been “very productive,” while the deputy mayor of Jerusalem said it is the “only thing” that will work.
So why is President Trump criticized for leaving the Iran Deal and his 'Maximum Pressure' campaign? I'm especially interested in answers from US or international community perspective.