Farideh Moradkhani, Khamenei's niece, posted a video a few days ago urging world leaders (mostly EU, UK and India are the ones who can be trusted to cut off these ties) to cut all ties with the IRI. She's been arrested. Got nothing but respect for her tbh, she could have kept quiet about the oppression taken some of the country's wealth and fucked off to Canada or the UK like so many other family members of the leaders. Instead she's stayed in Iran and become an activist.
Also I know it is a difficult thing for the EU with Russia being a bunch of cunts, but cutting off the IRI is necessary. It doesn't matter that they have lots of oil and natural gas and Europe needs it right now. Europe can not pretend it stands for human rights while maintaining any sort of relationship with the IRI. The nuclear talks don't matter at the moment either. Maximum pressure on the IRI is the only thing that matters with regard to foreign policy with Iran right now.
Sever all ties. Confiscate Iranian assets funneled out of the country by the leadership. Detain, or better yet, deport their families - the way Ukraine deported Iranian students back into harms way... but this time it would be the children of the people who make the rest of the country suffer. People who might actually change Iranian leadership's mind about their oppression.
And for those who are curious - here's her video: