It is an ideology for selfish amoral oppotunists

I can only speak for America, but here they’re all a bunch of corporate-sponsored anarchy LARPers.

I think Libertarianism is incompatible with the way that humans operate as a society. Almost all flavors of libertarianism puts an individual’s right to live as they choose as long as that doesn’t violate the rights of others through force or fraud. Humans like to associate themselves into groups, and in almost any group there will be an imbalance in power, whether that’s economic power, physical power (strength), or even something as abstract as eloquence or how outgoing you are. The issue then becomes that someone somewhere has to enforce the right to not be forced into giving up rights. In the classical construction of how libertarians view government, it is very easy to become more powerful than those meant to enforce limits on power. Even in our current political system, you see this when companies will spend more on their anti-trust court cases than the entire FTC spends total in a decade. Libertarianism has no mechanism to keep the enforcer the most powerful party involved

If you mean the Statesian, pro-capitalist kind, it’s mostly a silly ideology pushed by small business owners and other highly individualist classes that are nonetheless pushed towards the working classes by competing against ever-growing monopolies.

The left wing version, I disagree with as you can’t dismantle the state without removing the basis of the state, class, and you can’t remove class without collectivizing production and distribution. Small, local cells loosely organized in a decentralist fashion would still result in class struggle and thus a form of state to hold one class over the others. That said, the leftists are valuable allies at times despite disagreements.