People are downvoting you, but I think you actually make a good point here.

I'm just not sure which one is which. Is Dopamine Voldemort or Umbridge?

In this context, Voldemort. They're clearly embracing the role and even playing it for publicity, like a classic villain going "muahaha!" about their evil plan.

Contrast the new 'social credit' system in China - it's (IMO) pure evil and a disturbing example of government mind control, but presents itself as orderly virtue.