Answer
Ali Khamenei, the current Supreme Leader of Iran, was the target of Banisadr's criticism. Banisadr, who served as Iran's first president after the 1979 revolution, had disagreements with Khamenei, who was then the president of the country, on various political and ideological issues. This led to a growing rift between them, with Banisadr eventually becoming a vocal critic of Khamenei's policies and leadership.