Still the ideology of both those isn't much more complex than : "big gov bad, no rules no masters no toilet paper"

Libertarian literally was just the euphemism for anarchist when calling yourself the later could get you arrested.

It was intentionally reclaimed when it fell into obscurity by i want to say Rothbard I think who was angry liberal meant a social progressive and not what we now think a libertarian is.

Honestly, there was not much to coopt. Rightists just looked at the contradictions inherent in anarchism and deemed them awesome instead of a good reason to rethink this anarchism thingy.