I'm sure there was some legitimately horrible "regime" somewhere along the line that happened to line up against US interests by accident but I can't think of any. Most of the legitimately awful terrorist groups the US has been against in my life were funded by the CIA, and the US only went after them as an excuse to loot resources, control territory in places we have no right to be in, or to harm a geopolitical enemy with no relation to the terrorist group we were supposedly fighting.