I agree with your sentiment but myself I'm not convinced that either politics or corruption are actually (in reality) one-dimensional as you're suggesting, despite fairly widely reported trends towards world-wide political polarisation, and various different groups/parties/companies trying to appear as if they don't harbour corruption in a black-and-white way (how ridiculous!?) these things affect all systems to varying (nonzero) degrees.
I think there are actually still plenty of other dimensions/axes/structures one can think and argue/discuss about even if not many people (or politicians) actually do!
Authoritarianism surely sucks on so many levels though, I will echo that for sure!