I'm familiar with it (although I haven't read the whole thing) and I think it's not representative of what living in New Hampshire is actually like. I went to college there and then more recently I lived there for four years. Some stuff was weird even to me (my neighbor set up an improvised firing range behind his house, and driving without car insurance is legal) but overall the towns where I lived seemed well-governed and most people valued their independence but not to the extent that they would reject the rules necessary for an orderly society. What some weirdos did when they came to New Hampshire says more about weirdos than it does about New Hampshire or lowercase-L libertarianism (as opposed to the Libertarian party, which is marginal even in New Hampshire).

Because it's #3 in the nation in per capita impact of opioid use disorder, after West Virginia and Ohio?

Fact is, these places that MAGA wants to label as hellholes are the cultural and economic engines of our country. Even places like Texas are driven entirely by their urban blue counties.