Kpop has something called stan culture. When it comes to which groups to be a stan of, music is not the only criterion. And after taking everything into account, male stans preferably lean towards girl groups, because of parasocial relationships and all that jazz.
But at the end of the day, the discussion is not really relevant anyway, because the average joe doesn't stan any kpop group. And when he does, I'm not even convinced he does it for an extended period of time. Just based on my own experience, my gg stan days are already over.
The criticism I don't get is when people blame men for not stanning bg's then acknowledge that bg's are targeted towards a female audience. If bg's are not for men by design, why should men go out of their way to appreciate them?
It's true that many men use to shit on anything they don't like personally. But it has nothing to do with genders. The same behavior can be observed within male dominated areas, like video games, comic books, etc.