The Simpsons is an animated sitcom created by Matt Groening. During the first 10 seasons, the show was considered one of the greatest TV shows of all time. However, ever since Season 11, the show has been going downhill and still hasn't recovered from Season 9's "The Principal and the Pauper".
- Some of the characters have been flanderized beyond recognition, especially Homer Simpson (who went from a dim-witted but well-meaning father, to an extremely stupid father who can sometimes become a selfish jerk, leading to the nickname "Jerk-Ass Homer", which even the show itself has referenced) and Ned Flanders (who went from someone who was religious but cared about other things as well, to someone who only cared about religion and also the namesake for Flanderization).
- Like modern Family Guy, it tends to overuse pop-culture references, and overuse celebrities and product placement.
- A few episodes from these seasons rip-off episodes from the older seasons. These episodes also tend to copy and paste some old jokes from the older seasons as well unless if done right.
- While the animation did improve, it isn't as lively as it once was.
- Some episodes are extremely preachy and even stray into pro-S.J.W. territory, especially episodes centering around Lisa.
- A lot of stale and repetitive jokes. Some of them are just tasteless (like the 9/11 joke in "Moonshine River"), and some are flat-out disturbing like Marge pressuring Homer into having sex with her in "Strong Arms of the Ma" and Homer getting raped by a panda in "Homer vs. Dignity".
- Some episodes are just flat-out boring, mediocre at best or are hard to watch due to the plot being very confusing.
- The show tries too hard to stay relevant. It has constantly done things to try and get attention, like killing off Rabbi Krustofski and Maude Flanders or having Homer and Marge undergo a fake divorce.
- Several of the recurring characters are really annoying and unlikable, especially Helen Lovejoy, the Rich Texan, Gil Gunderson and the "Yeeeeeeeees!" Guy.
- Some of the couch gags (whilst being funny and enjoyable) can get disturbing (i.e. Banksy's couch gag in "MoneyBART" and Don Hertzfeldt's couch gag in "Clown In The Dumps").
- A few of the endings are either rushed or confusing, like the ending to "Lisa Goes Gaga".
- Some of the songs are cringeworthy or hard to listen because of how bad they are or are used so poorly like the song "Making a Food Blog" from "The Food Wife" and the "Tik Tok" intro from "To Surveil with Love" (Okay, Tik Tok isn't really a bad or a godawful song like Justin Bieber's Baby, but it's not used in a good way unless you like it), but not too many bad songs.
- The voice acting, while good, can get annoying for some of the characters sometimes, especially Marge and Ned Flanders. However, this is targeted for people that can get annoyed easily at the voice acting.
- There's still plenty of more and more enjoyable episodes like "Behind the Laughter", "Trilogy of Error", "How I Spent My Strummer Vacation", "Hungry, Hungry Homer", "I Am Furious (Yellow)", "Halloween of Horror", "Jaws Wired Shut", etc.
- Some jokes are still funny, like Ralph Wiggum's 'Ralphisms' and Bart prank-calling Moe.
- The Itchy & Scratchy segments and title episode parodies of various shows and books are still funny.
- The side-characters are still memorable and likable, like Barney, Moe, Krusty, Lenny, Carl, and Mr. Burns.
- Still had heartwarming, funny and tearjerking moments in the end.
- The new HD intro from mid-season 20 onwards is good, with references to earlier seasons, and a billboard gag, along with some recurring gags such as Lisa's instrument.
- The main voice cast hasn't changed much.
- The couch gags are still enjoyable and funny.
- The songs and music are still enjoyable. Even the theme song hasn't gotten old, nor has it changed (not counting the fact it switched to widescreen in 2009, which was the first change of the theme song since 1990 because back then, widescreen TV was taking over in the US, whilst there were shows produced in widescreen back before 2009 and 2010).
- At least it's not as bad as Seasons 6-8 of SpongeBob SquarePants or modern Family Guy.