Earlier quoted context omitted.
I wouldn't call them a counterculture by any stretch of the imagination. Kpop is deliberately manufactured culture. The personalities and music are meticulously curated by corporations. "Underground Kpop" is practically an oxymoron like a "married bachelor" would be. And that's not to insult or knock it.
Listening to KPop in a country where it is not a major genre, might still be counterculture. Think back to the 1960s and 1970s: a lot of the American rock 'n' roll even then was curated, but those young people in the Soviet Union, say, or Morocco who started listening to it where definitely seen as a counterculture within their own country.
Abstractly maybe, but in actuality an enormous amount of money and effort is spent to market K-Pop in the US by some of the largest media companies in the world.