Could you point me towards any examples of "good" socialism?

The healthcare system of every developed country except the USA

You don't really need socialism for proper health care. Almost all of the countries you're referring to are solidly capitalist economies.

They are, but their health care systems are everywhere on the scale from textbook socialism to capitalism-with-lots-of-rules. The UK's NHS, for example, employs the doctors, paid out of general government revenue, and provides otherwise-free health care.

That's not the point. The GP's error was calling the policy in question "socialism". It is not. Even if socialism->bad were always true, that doesn't imply the reverse, i. e. bad->socialism.

Spying on citizen has historically been used by every non-democratic regime, from the right-wing fascists to left-wing communists and west-wing Nixons.

Social democracy is not socialism.