To me, it has the opposite of charm. And a lot of times, charm is not enough. Charm didn't save Bleach, and it didn't save Naruto. But HxH has no charm, and OP has the opposite of charm where seeing it drives me into a frothing rage.
I think a good example of charm in a show is say, The Flash, where you excuse goofier elements and character pining because everything is so high concept and fun.