Yeah, I feel like "libertarian" is just vibes-based for dudes of a certain age, and not really an ideology. Like "centrist" it's a way of signalling to each other that they stand above politics, and don't get involved in the petty bickering of people who care about things.

I think this was through intentional propaganda: stuff like framing that stupid political compass as two Freedom - Authoritarian axes and South Park's detached contrarianism. The end goal is to get these people to vote for conservative causes and convert some of them to ideology.