Yeah, for definitions of "hard left" that don't include a penchant for rugged individualism, a nearly pathological hatred of taxes and libertarianism, a lot of reddit is just liberal on social issues, at best. There is still a strong libertarian current of thought that is quite opposed to anything that could remotely be accused of being socialist and leans hard into tech utopianism saving us from the predictable outcomes of our current course of actions. There are also sizeable populist and conservative communities there. Sure, you have politically oriented subs that explicitly adopt leftist positions, but you could point to plenty on the right as well.

I guess just how for certain conservatives in the US, anyone to the left of Reagan is probably the love child of Stalin and Satan himself, it seems like calling any place that doesn't actively purge and issue an apology repudiating any leftist view that slips through is liable to be declared a haven of leftists.