The problem with that, is that the Libertarian party is quite weak when it comes to actually doing anything. Policy-wise, they're fine. But put them in an election, and they fall apart. No real party there, to speak of.
2016 is a prime example. You had the candidates from the two major parties that were, at the time, not particularly appealing to a large segment of the voting public. Isn't that an ideal time for a third party, that has been around for a loooooong time, to make some headway against the two party system? Yes, of course!
But what happens? The stoner candidate can't correctly respond to a question about Aleppo, or some damned place that he doesn't care about. I thought Libertarians were not particularly interested in foreign policy, but instead of saying that, he just muffed the question.
That's exactly what I expected, and would expect if a Libertarian were to get caught up in a debate against a skilled candidate from either party.