I hate that I know this word or that it even exists. Kakistocracy is a government where the worst person/people is/are in power.
According to the online etymology dictionary, it’s:
“government by the worst element of a society,” 1829, coined (by Thomas Love Peacock) on analogy of its opposite, aristocracy, from Greek kakistos “worst,” superlative of kakos “bad” (which perhaps is related to the general Indo-European word for “defecate;” see caco-) + -cracy. Perhaps the closest word in ancient Greek was kakonomia “a bad system of laws and government,” hence kakonomos “with bad laws, ill-governed.”