Kuwait is a dictatorship. South Korea and Taiwan were, too until the 80s-90s. Especially, in the case of Taiwan it is unclear what US intereference there has been politically: the Chinese fought hard to be free of interference and although in Taiwan they need US support I don't think they are as controlled as South Korea and Japan (which has been invaded and "vassalised"). If interefence there is it is indeed to literally interfere to foster separation with the mainland.

Re. Iraq, interestingly the US invasion has vastly increased Iran's influence in the country because the majority is Shia while Saddam was from a Sunni tribe.