I won't stand for Carter slander: he was a darn good president too. What he wasn't good at, was politicking, and that was because he also was a good man, to a fault. He gave an honest answer to a question on if he had ever lusted after a woman who was not his wife, and reaped a scandal.
He created modern iran by trying to ditch the shah?
No way that created the modern Islamic Iran. Carter supporter the shah. To the extend USA decided the outcome, it was by supporting the shah for too long, and for the US role in the 1953 coup. But IMO the USa played third fiddle in that story, this was between Ruholla and the shah