I understand your frustration, but in reality you are just helping Democrat politicians, because your Libertarian vote would be a wasted vote in the end.
Man up and fight the fight from a vantage point that will do the most good. That is voting for a Republican. Even most RINO's are better than another Democrat, even if sometimes that doesn't seem to be the case. Work hard though to identify and replace the most egregious RINO's. Electing Trump as President has made spotting them become much easier.
On paper Libertarians are perfect. In reality they have their heads buried in the sand. They cost us several Senate seats in the north west for several years.