> The EU could have also enforced the JCPOA as one of it's guaranteers but decided to be inward facing instead of treating the 2014 invasion of Ukraine as the wake up call that it should have been.

Is this about JCPOA or the 2014 occupation of Crimea?

JCPOA was being enforced by its EU members, but when the US pulled out, it fell apart. EU based companies couldn't continue to take part of the lessened restrictions because of the fear of direct US sanctions on them, which made Iran mostly uninterested in continuing its participation. It was entirely the fault of the US.