It's not supposed to be a generalized slur -- but you need to consider that there is no concrete identity for these outsourced animators for which the blame to be fixed. What we know is they are not Nara Animation, and they are not nearly as good as Nara Animation.

It is possible, though I don't know if true, for a company to exist in Korea that does excellent work in the field of animation. Its relevance to the current situation is questionable, for while the subpar work is obviously done from a group different from the norm which we have become accustomed, it is almost certainly all done by the same third-party group, whoever they are.

What I wonder is how this money/team size/timelining issue is working out so far for the producers. They can't be any happier than us fans when it comes to having half of their episodes tweened to hell. There must be a factor at play for why they cannot a) move to a bimonthly airing format, b ) budget new hires and training for Nara Animation to handle the workload, or c) find a different outsourcing company.