While you have a point, what's the plan to change anything? The Libertarians have been around for over 40 years and are nowhere near being competitive. Newer parties -- Green, Constitution, etc. -- haven't made any serious inroads, either.
I suspect any immediate change will come through the two parties we have and we've gotten a glimpse of how that process might work. Remember -- had it not been for the DNC pushing Clinton regardless of what Democrats thought of her, Bernie Sanders might have gotten the nomination. We did see the Jeb Bush-loving RNC get spiked by Republicans who nominated Trump. And, yes, I do realize a lot of people just detest Trump, but his populist appeal during the campaign is hard to deny.
The point is, one of the days we could well wind up with a populist rabble-rouser who will be more interested in the good of the country than party lines or what donors and lobbyists want. However, it doesn't look like that person will come from one of the ineffective third parties. The chances are good that person will be a Democrat or Republican.