Ugh, still peculiar to see mainly the Koreans complain about this mess.
Never been a fan of Huk, has that prima donna attitude that a manager of a team should never have (let the good players have it, if anyone really has to), but I still believe the truth, as often, might lie in between the 2 versions, which is imo even worse as there's no "simple" way to prevent it to happen again.
If it's just the players (Koreans mainly), either go full go Korean or release them (and yes you'll become weaker), if it's just HuK, well force him to take not one but 2 steps back, but if both sides were at it... eh kind of hard to fix it. :(