I don't think it's complacency. A significant part Trump's base demographic isn't freedom loving, limited government, human rights advocates - they're "America First", nationalist, pro-gun (certainly), xenophobic, racisty, anti-free trade, economically insecure & under-educated. Additionally, there seems to be a strain of anti-neo con isolationism combined weirdly with a traditional Republican militaristic, aggressive foreign policy stance.
Trump has, somehow, managed to co-opt a big chunk of the mainstream Republican party, but I can't imagine he's impressing many in the libertarian wing of the Republican party, let alone actual libertarians (other than the schizophrenic Dotini). I think there's still a distinct possibility that Trump will collapse the GOP & lead to it splintering into different factions.