Re: but the decision to raise the price was just one more sign of Iran’s faltering economy
It wasn't the US that encouraged Iran to expand into Yemen. They did that on their own. It was their work in Yemen and Syria that encouraged Trump to break the nuclear deal - although as it was one of Obama's successes, he was bound to not like it anyway.
It is pretty pathetic that the Europeans have failed to even get their "special purpose vehicle" to protect investment into Iran up and running by now. When did Trump pull out of the agreement? 2 years ago?
I suspect their heart isn't really in it, because the Iranians aren't exactly easy to work with. But it's a pretty massive failure of diplomacy - that's going to make future deals harder to agree.