It's fine as a personal philosophy, it's terrible as political theory.

That's actually my stance, as mostly a libertarian.

Libertarianism is great as an ideal, not great as an answer to the problems that plague us. It has too many holes when it comes to gatekeeping. You need some level of nationalism, tribalism, protectionism, and even collectivism and racism, if you care about protecting an identity/people/country/values.

While some libertarians are capable of embracing those things, very few embrace all of them at the same time...and the movement in aggregate certainly doesn't.

If you can't identity what it is you want to protect, you're vulnerable to letting bad actors in to victimize you by using your own ideals against you and your people. "Individualism," while a good ideal, is not a good system to actually protect the freedom we all care about.