Whether it's because they see teens as delinquents up to no good, monsters, sex fiends, or just plain bullies, some characters just have it out for teenagers. Adults, especially the elderly, parents and middle/high school teachers, might despise teenagers for rebelling against their authority and being sassy little runts, while children might hold a grudge against them for being bullies and having more freedom, which they're very much jealous of. Even teenagers themselves are susceptible to self-loathing due to negative experiences with their age group. It should be noted that adults who don't hate both children and teenagers may actually favor the former more for being more innocent, and parents who fall to this trope may feel nostalgia over when their rebellious teen Used to Be a Sweet Kid. Conversely, kids who don't also hate adults may actually be on the latter's side for attempting to discourage teens' misbehavior (albeit unsuccessfully of course).
Much of the fuel for this trope comes with the stigma centered around teenagers. Recklessness, cringe, and immaturity are commonly associated with this age group, even though that isn't always the case.
This trope generally has the Teen Haters in question be portrayed sympathetically if the work portrays teenagers as monsters or, in a less villainous case, simply cruel kids. However, the work may take the opposite route by having the teens be sympathetic Troubled Teens whose destructive behavior results from a Dark and Troubled Past, problems at home, or just frustration over being expected to act like adults yet being treated like children, thus giving them a Freudian Excuse. This may make the Teen Haters in question the antagonists. In retaliation, the teenagers may retaliate by forming a Teenage Wasteland.
Compare Child Hater, the younger version of this trope, which may overlap if the work takes place in Junior High and has the early teens be more developmentally in line with preteens. In contrast, the Child Hater trope portrays its victims more sympathetically by using the belief that Children Are Innocent, though they can be portrayed just as equally unsympathetic as victims of this trope if the work insists that Kids Are Cruel.
It must be said that there are people in real life who detest teenagers. However, given the controversy of this subject, No Real Life Examples, Please!.
- Kagemaru, the main antagonist of the first season of Yu-Gi-Oh! GX, even flat out admits it; after yelling at the assembled crowd of students to be silent when he finally shows up, he remarks, "This is why I hate teenagers".
- The Inventor of Ms. Marvel (2014) fame is this in spades. The rationale behind his plan is basically every anti-millennial screed you've ever heard turned Up to Eleven. It's ambiguous how much of it he actually believes, and how much is just him taking advantage, but he's absolutely encouraging teenagers to internalize self-hatred.
- At one point in Spider-Man: Into the Spider-Verse, Peter Parker proclaims "Teenagers are just the worst."
- The Breakfast Club: Vernon hates teenagers in general and Bender in particular. Made worse by the fact that he works at a high school.
- Hocus Pocus: After two firemen come to shut off the "burning rain of death", they express contempt for teenagers on Halloween once they exit the house.
Fireman #1: Teenagers again.
Fireman #2: I hate Halloween.
- Mighty Morphin' Power Rangers: The Movie: Ivan Ooze verbally expresses contempt for teenagers. It is implied that the reason for this is because the heroes who defeated him in the past were also teenagers. He even finds the smell of teenagers repulsive.
- In Diary of a Wimpy Kid, Frank Heffley, Greg's father, loathes teenagers due to their tendency to vandalize and TP his house on Halloween, a holiday which he very much fears the upcoming of. He becomes armed with buckets of water to drop onto them once they come onto his property to trick-or-treat. As the series goes on, its clear that he hates any teenager from random ones to his oldest son Rodrick. He even considered sending Greg off to military school when the latter had turned 13, only to change his mind when Greg accidentally saved him from public embarrassment.
- Clarisse McClellan in Fahrenheit 451 is seventeen herself, but is scared of kids her age who, in this 20 Minutes into the Future Dystopian America, tend to be violent and reckless enough to regularly get each other killed. "I'm afraid of them and they don't like me because I'm afraid."
- Phineas Nigellus Black of the Harry Potter series loathed his students who would be from ages 11 to 18. He thought of them as tedious, self-absorbed know-it-alls. The feeling was probably mutual.
- Jessica Jones: In the episode "Ain't We Got Fun", Jessica outright admits her opinion of teenagers being "self-absorbed little assholes".
- Obstructive Bureaucrat Superintendent McClellan in Monster Warriors. He is Mayor Mel's ambitious and incompetent adviser who constantly suspects teenagers are behind all wrongdoing in Capital City. And when he becomes mayor, his fact is to build a detention centre for teenagers.
- During the prom in Season 6 of Parks and Recreation, April explicitly tells Andy that she hates teenagers as an excuse to go home since she's embarrassed being in a high school building, while Andy still wants to dance.
- Teen Wolf: This exchange from "The Girl Who Knew Too Much".
Stiles: Do you realize how suicidally crazy that was? What were you thinking, going after them?
Cora: I did it for Boyd! None of you were doing anything.
Scott: [sadly] We're trying.
Cora: And you're failing. You're just a bunch of stupid teenagers running around, thinking you can stop people from getting killed. But all you do is show up late. All you really do is find the bodies.
- Helluva Boss: When the Cherubs bring Lyle Lipton to "Lover's Lookout" in their effort to convince him not to kill himself, he expresses distaste in teenagers upon arrival.
- TheOdd1sOut: In "Movies I Thought were Weird", James mentions that part of the reason he hated Teenage Mutant Ninja Turtles as a kid was that he hated teenagers because some teens were mean to him in the past.
- 6teen: Ron is a mall cop who has a strong distaste for teenagers. Some episodes show him obsessively stalking the protagonists in order to fine them for even the most minor of infractions.
- Codename: Kids Next Door: All of the KND despise teenagers as a result of the show exaggerating the stereotype of kids being kids. This was best shown in "Operation P.O.I.N.T.", where the group is shown eavesdropping on teens outside of "The Point" and plotting revenge against them, a Make-Out Point where teenagers are described to make the transition into full-grown adults upon admission. Their hatred is so exaggerated to the point where any member of the organization is kicked out with their memories wiped once they reach their 13th birthday, regardless of their dedication to the group. Of course, it's also out of paranoia that said member could escape with vital secrets and sell them to their enemies should they betray the organization after turning 13, which has happened at least twice. The Delightful Children tried to make nice with the teen supervillains, but even they found their behavior infuriating.
- DC Super Hero Girls (2019): In the pilot episode "#SweetJustice", the girls discover a plan to distract teenagers with LexCorp VR goggles while LexCorp robots destroy all the teen hangouts. The culprit is not Lex Luthor (a teenager himself in this incarnation) but his little sister Lena, who hates teenagers and wants to lead a revolution against them.
- Gravity Falls:
- Zig-zagged. Grunkle Stan is in most cases no fan of teenagers, openly dreading the annual outdoor music festival that attracts them to the town. That is, until Soos points out he can make lots of money if he can attract their business. Although he does get along with Wendy pretty well and Soos spent his entire teenage years working for Stan.
- "The Inconveniencing" features an abandoned convenience store haunted by the ghosts of its former owners, who absolutely loathe teens due to how they treated the owners in their old lives, leading them to die. Naturally, Wendy and her idiotic friends decide this would be an excellent place to party. One by one, they each fall victim to the ghosts, only for Dipper to save them by revealing his true age ("I'm twelve - technically not a teen") and placating the ghosts with a rendition of the "Lamby Dance."
- King of the Hill: In the episode "The Man Who Shot Cane Skretteburg", Hank, Bill, Dale, and Boomhauer are outmatched by a group of cruel teenage boys in a game of paintball, the boys previously having ambushed Bobby and Joseph. The boys capture and "execute" Hank and the guys (in reality, they just torture them with their paintball guns), leading him to have nightmares of being shot. During his rematch with the boys, Hank and the guys begin taking observational notes on teenagers. In the aftermath, Hank agrees with Bill's previous statement that "teenagers are cruel".
- Parodied in The Simpsons episode "Old Money" when Grampa stereotypes teenagers as punks: when Grampa first meets Beatrice Simmons, he remarks that they're staring at each other like a "bunch of stupid punk teenagers", due to Beatrice's lazy eye.
- South Park: Parodied in the "South ParQ Vaccination Special". Elders act like rebellious teens after getting their shots:
Mr. Mackey: Think my life doesn't matter!? I show you what matters. [packing up his books] Counselors matter. That's what matters. Let's just see how your God damn school functions without a God damn counselor! [the sound of a motorcycle is heard outside] Oh, God dammit. [walks up to the window] Hey! Hey, you damn old people! [an elderly man is making drifts with his motorcycle in the school's parking lot, while an old woman looks at him] Stop doing donuts in the school parking lot!
- Total Drama:
- Series host Chris McLean has stated that he hates teenagers. Seeing that he spends pretty much every episode putting the teenage contestants through hell for the sake of ratings, it's easy to believe.
- Chris's sidekick Chef Hatchet also takes sadistic pleasure in torturing the teens most of the time; however, there are moments where he feels that either he himself or Chris have gone too far.