The US didn’t install a corrupt dictator. It basically backed groups who were looking to overthrow Mossaddegh, who himself was fighting to stop from being ousted by the Shah (who held that power legitimately).

There were already riots in the streets over his rule. He was going to be ousted CIA involvement or not.

Plus it’s a bit odd to blame the US for a ruling body who ousted the US backed one.

That’s like blaming the US for the Vietnamese Communist party today.