I honestly can't see how anyone can be that negative about htis episode. I found it hilarious! I could list why, byt then I'd have gone through every single thing about the episode. But especially I think it has to do with the fact that this was a Butters episode, which I always enjoy, and had Lu Kim (one of my favorite South Park characters) in a prominent role. By now it's expected, especially in a Butter's episode, that the adults will usually be stupid or unreasonable. The multiple personality thing was not really out of left-field, I mean Butter's does adopt different personas for hinself when he wants to have fun. The Dr. Janus plot worked well with Butter's reactive nature, and presented some really funny moments. Lu Kim's plot worked extremely well as well because of how he tried to outsmart the japanese suchi bar owner and just the extremes of his hatred of the japenese (which is kinda justified when looking back in history). The episode felt like somting out of season six, and felt enjoyable beginning to end. As for the Lu Kim-Janus reveal, it's not really much of a retcon, because Lu KIm is seen so rarely that it isn't completely impossible. Honestly, this was the best episode of Sout Park since The Coon, and I hope for a lot more quality episodes like this later in the season, and especially for next week's half-season finale.