Honestly, I knew people weren't going to like this one when I heard about it. But I like Dan and Phil, and I didn't mind the silliness of the episode. Not every episode needs to be as serious as most are. It's a cartoon, aimed at young kids, and for what it is, most of the episodes convey very nice themes and morals. I don't see anything wrong with having an episode that serves the primary purpose of being fun and light-hearted, and at some point everyone deals with people like the gorilla princes, so it's a nice laugh.
Also I find it odd how so many people hate the fart jokes when TLK has always had its share of them—it's kind of a staple of the franchise. I'm honestly surprised (though grateful) that there aren't more of them. I think they're sparse enough so as not to be overbearing or bothersome.
It's just a cartoon, people.