There are a few reasons why the Iranian revolution of 1979 may be seen as a mistake by some. One of the main reasons is that the revolution led to the establishment of an authoritarian regime under Ayatollah Khomeini, which restricted political freedoms and human rights in Iran. This regime has been accused of repressing dissent, cracking down on activists and opposition groups, and imposing strict Islamic laws that many Iranians may not agree with. Another reason is that the revolution had far-reaching consequences for Iran's economy and international relations.