I'm more interested in the groups than in their companies. I see the problems some groups have with their companies. But cursing at them won't change much. Even if you want to support only the groups with your money, the companies earn on you. You curse at a K-Pop company, and then you buy their new releases...
K-Pop groups should start funding their music (then you can support your favorite groups directly) or at least should left the big companies and join the smaller fairer ones. So these K-Pop labels can grow and get more dominant in the South Korean music industry.
I read an interesting comment about that topic at reddit. Someone compared today's K-Pop industry with the old Hollywood studios from the late 1920 until the 1960s. The way studios like MGM, Universal, and Paramount operated was very similar: recruit unknown actors, train them, and present them as glamorous stars in several movies per year.