What do you expect when the GOP has become just as liberal as the Dims? The Libertarian Party was borne out of frustration of Nixon's wage and price controls. Ditto for the Conservative Party of New York State, when the Rockefellers took over the state GOP in the early 1970s.
And whenever Libertarians try to work within the GOP they get the shaft from the party bigwigs.
The Republican Party is not "just as liberal as the Dims." Just check the voting records and ADA or ACA ratings of congresscritters. Even most RINOs have better records than most Demonrats. Mainstream Republicans have much better ratings. A libertarian radio guy once exploded into venom when I told him that there were more libertarians in the Republican Party than in the Libertarian Party. There is a sizable minority of the Rep. Party which is hard-core conservative. The present leadership is the problem, plus the veto power exercised by a handful of RINOs and loose-cannon egomaniacs like McCain, who block good judicial appointments. Like it or not, third parties do not work under our system of national politics. NY State was a special case, and the founders of the NY Conservative Party said so at the time of their founding.