I'll be blunt, I've never actually met a libertarian by the definition of libertarian.
I found the easiest way to find out. Ask about gay marriage and abortion, they'll want them outlawed, want the government stepping in.
Libertarians were just Republicans who wanted to smoke weed, and now that Republicans are cool with weed they don't really have anything left.
Hey! I'll give you credit that sounds like you might have been one of the rare unicorns on it when you were one. Honestly with Republicans I've heard the same "hate cops" unless the cops are going after people they like then they love them. Republicans treat cops like soldiers, they say they support them... riiiiiiiiiiiight up until supporting them individually. But yea, definitely on the war front is a nice change of pace.
I agree on the unrealistic and awful... I in a lot of theoretical ways like the libertarian concept, I'm very much a "leave me alone" type, I just know too many that didn't have the support when they were growing up that if there is nothing to help them... it feels cruel to do the "pull yourself up by the bootstraps" mentality.
And I definitely understand where you're talking about on growing up and the expectations. I'm a white middle class guy, grew up in the area surrounded by confederate flags that is the exact area where "God and guns" is aimed at so expectations of me being a Republican. I just was raised by an old school bleeding heart liberal so like my dad and I talk I comment it's funny I'd hear "You'll be more conservative" as you get older and I'm over here going man... I was WAY more conservative when I was in high school and college.