Based on Iran's political activity in the last decade including before Trump withdrew, there is absolutely zero reason to believe Iran would be willing to keep their massive centrifuge capacity mothballed and zero indication that they were willing to explain to the IAEA about the undeclared sites where nuclear material was discovered.You are assuming years of there being a deal in place would result in the same state now that Trump created having torn up the deal.
I think there is very little reason to make that assumption.
I find it expected that talking heads on news channels and rando tweets to be extremely superficial in their analysis of international relations and instead boil everything down to what the US does but Iran's geopolitical aims have been consistent since 1979. There are things to blame the US, UK, etc. for but it is naive to ignore Iran's choices and actions.