Maybe not the "good guys" in an absolute sense, but as a US citizen, I would expect the US to be more aligned with my interests than the Chinese government.

All countries are attempting to spy on each other. Of course they are. If you expect your country not to because of some misguided belief that this would make them a "good guy" you're just asking for your country to be weaker than others.

It's not cognitive dissonance. That's like saying, "Gee you don't like when the other team scores a goal, but you sure are happy when your team does it!"