I'm honestly baffled by this. I care who wins because of the POLICY DIFFERENCE, i.e. the difference between what the two parties want to DO with their power. I can't even imagine what kind of worldview I would need to have to believe that the desirability of a political regime is a function of the level of courteousness of the politicians within it, so I'm struggling to understand where you're coming from with this claim.
Authoritarianism consists in undemocratic rule in which obedience is brutally enforced, and dissidence suppressed, using the security apparatus of the state.
Authoritarianism does not consist in using every avenue allowed within the rules of a democratic system in order to exercise power, even if it's "not nice".
Again, it's genuinely puzzling how you could conflate these two things.
