I am searching for a word that describes a politically corrupt world/universe in particular an antonym to the word cosmos. I have searched thesaurus.com and came up with nothing. I have considered the word dystopian but discarded it as it does not imply being politically corrupt.
While the reference is obscure nowadays, you could call your universe a Tammany Hall. For a more current term, kleptocracy certainly is widely used to refer to corrupt regimes.
And I agree with the comments: "cosmos" in no way implies lack of corruption.