Earlier quoted context omitted.
I still think you might be missing the point of Pitchfork. Pitchfork is more about the cultural conversation around media than the content of that media. Take their 1.9 review of Tool's Lateralus [1], which was very positively reviewed at the time by most people who liked metal and prog rock, and has since become one of the most influential metal/prog albums. Most reviews of the album went something like: "If you don…
> Most reviews of the album went something like: "If you don't like metal and prog rock, then you probably will hate this album, because it is a tour de force of these relatively unpopular genres. If you like metal and prog rock, then you probably will love it." Because that's pretty much all a reader needs to know. ... > The point of the review is that if you're a fan of metal, Tool's Lateralus is a 10.0. If you don…
Now R&M is an immensely popular show, but we all know there is a subsets of its fanbase who are intolerable and who unironically speak about this cartoon as being for people with high IQs. Now imagine if a contemporary publication published a review of the latest season and chose not too focus on the content but rather parody these fans. Fans of the show will watch the new season regardless of the rating and people who hate it won't, but both would get a chuckle out of a parody of that intolerable fan and for R&M they benefit either way by being mentioned. Further, as stated by previous commenter, this type of review opened up a conversation about whether a fanbase becomes a legitimate reason to dislike an artist/creation.
Also, if unfamiliar with Tool, check out any of their songs on YT and read the comments, you will understand the need for the parody.