Imma be real this "LiBeRtArIaNs" bullshit is new, misguided, and region specific, and even within that region is debatable.

Small "L" (goddamn sans serif fonts) "libertarian" is literally just the diametric opposition if "authoritarian." That's it.

"Big L" "Libertarian" for some reason has come to mean The American Libertarian Party™ specifically. "They've been taken over by the right" maybe, sure, but they can't have the entire concept of libertarianism no more than the US Democrat party is the entire embodiment of democracy, they're named after those concepts but those concepts still exist without the bounds of the US party and the whims of said US parties' current leaders. Even if the Libertarian Party™ happened to perfectly align with your views on what "liberatarian" (as in the antithesis of authoritarian) means at any point in the future, they still don't have ownership of the concept simply because they're named that.

In reality, "libertarian" describes any number of people and ideologies as long as they're anti-authoritarian, including anarchism, and just like anarchism you can find many examples of people who claim it but do not understand it in the slightest, or seek to pervert it to their will intentionally.

Don't let authoritarians poison you against a word for a concept in an attempt to sway you to their side.