Everyone in this show is a Base-Breaking Character in some way, but these are the characters just about everyone hates.
- Marvin Monroe is hated by almost everyone, mostly because of his annoying raspy voice, but also for his judgmental stance. His voice actor, Harry Shearer wanted the character removed from the show because voicing him actually damaged Shearer himself. And even Matt Groening hated his annoying voice, which is why he was removed from the show.
- The Crazy Cat Lady gets a lot of heat for having one joke (it's in the name) that keeps getting used long after it stopped being funny.
- Rich Texan as well, for the same reason — his one joke is that he's a tired Texan cowboy stereotype.
- The Yes Guy is a similar one-joke character. His entire shtick consists of an exaggerated "Yeeeeeeeees" pronunciation in a parody of radio/TV comedian Frank Nelson. He was introduced in Season 10 and his (admittedly infrequent) appearances quickly lost their humor.
- While Ned is a fan-favorite and some people really hated the episode where his wife Maude was killed off, few people like their sons, Rod and Todd Flanders, since they are little more than a boring, overly sheltered pair of goody-two-shoes, whose life is always Played for Laughs, leaving little development or depth to either of them.
- Miss Hoover is generally disliked for being an extreme case of an Apathetic Teacher with no sense of humor. Plenty of fans call her the most boring character in the show.
- Gil Gunderson. He was introduced in "Realty Bites" as a parody of Jack Lemmon in Glengarry Glen Ross, but soon became a recurring character. While occasionally amusing, Gil's never developed beyond being a Straw Loser despite receiving several focus episodes and is often depicted as a moocher (especially in "Kill Gil"). It doesn't help that he occasionally works as an incompetent attorney, which led many to label him a Replacement Scrappy for Lionel Hutz (which itself is not helped by the fact that Gil's first appearance also happened to be Hutz's final appearance before he got Demoted to Extra).
- Jenda
, Bart’s future wife, many fans find her a flat, pretty boring and disappointing character. Worse, still, the Jean-era episodes canonize her as Bart's future wife when the role could have gone to almost anyone else and it would have been more interesting like Jessica, Sherri or Terri. Most of Bart's other love interests (particularly Mary Spuckler in her later appearances) are also often derided for being too vindictive of him. - Mike Wegman, for being an annoying, obnoxious fan of Homer with a habit of easily lashing out at anyone, especially Bart, who insults his idol, and having no likable traits. It doesn't help that he has made recurring appearances.
- The Spuckler family, for being a one-note family of redneck stereotypes whose jokes consist largely of either jokes about Cletus and Brandine's incestuous relationship or their impossibly large number of children. It doesn't help that they became seriously overexposed over Jean's tenure as showrunner, to the point of getting A Day in the Limelight nearly Once a Season in the 2010s, and still never developing past their initial traits.
- Hubert Wong is often disliked by fans for being a one-note rival to Lisa, and a blatant Suspiciously Similar Substitute for Alison. It doesn't help that one of his few significant appearances depicted him as a slimy Corrupt Corporate Executive and Romantic False Lead, making him very difficult to root for or sympathise with.
