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.

When the rubber hits the road, and they start interacting with the world, they'll settle into their actual politics. Usually it'll break toward resentment-based fashy stuff, like "centrists," because the vibe coming from a place of "I'm better than that," to begin with. But it can go the other way too if it's coming from where you were at, or if they start being personally affected/targeted by their allies.