Yeah, fuck trump, he is 100% responsible for this whole thing from the beginning to the end.
Was Obama's deal perfect? Of course not, but was foundation that could be used to build on top of. With JCPOA in place and lifted sanctions Khamenei likely would be replaced with less radical spiritual leader.
Even with war in Ukraine, Iran at most would just remain neutral.
And that raises a question, how come everything he does ultimately benefits Russia? Even things that at first look like they would be against them, later on always end up somehow helping it.