History Main / AntiMentor

* ''[[https://www.fanfiction.net/s/14223068/16/A-Savage-Nature A Savage Nature]]'': Rognak, the first orc druid, is an absolute prodigy who can perform almost every druidic spell, including a particularly powerful werebear transformation. But his talent along with the fact he's self-taught makes him an atrocious teacher. He can tell his students what they should be trying to do, but not how to do it. Thankfully, by the time he has students, he and they are all being taught by Cenarius, who is even more naturally talented but has over ten thousand years of experience at teaching.

* ''Literature/DungeonCrawlerCarl'': Most of the game guides vary between "not very good at their jobs" and "actively screwing over the crawlers." Donut theorizes that they hate their jobs and are taking it out on the crawlers. Mordecai mentions financial incentives to make the guides do their best, but apparently those aren't particularly effective. Special mention goes to Frank and Maggie's guide ([[spoiler:who told them the only way to advance was to murder other crawlers, leading to the death of their daughter]]), and Meadow Lark's guide (who seems mostly good at her job, but [[spoiler:once she becomes a manager she just checks out and treats the whole thing as a vacation]]).

* ''Manga/MyHeroAcademia'': Downplayed with All Might, who ''can'' competently guide a workout regiment, but the nuances of regular teaching are beyond him. He lives up to his reputation as the [[IdealHero Symbol of Peace]] a little too well, since he originally [[InstantExpert got a grasp on his powers so quickly]] that he didn't really need to learn the basics. As such, All Might legitimately has trouble understanding Izuku's much slower progress, and much of his well-meaning advice is uselessly vague. He's not much better with the other 1-A students, accidentally coming across as a bumbling SinkOrSwimMentor. One of All Might's own mentors, Gran Torino, outright lampshades that the world's greatest hero is a ''terrible'' teacher. However, after [[spoiler:burning out his powers]], All Might starts to get better about, if only because he's been reading "Teaching for Dummies" books.

* ''Literature/HarryPotterAndTheChamberOfSecrets'': A famous wizard, Gilderoy Lockhart, is hired by Hogwarts School to teach the students Defense Against the Dark Arts. However, when he begins teaching, it quickly becomes apparent that he's rather incompetent, while passing his failures off as "accidents". That he's revealed to have stolen anonymous witches and wizards' feats in order to become famous doesn't help.

* ''Webcomic/MobPsycho100'': Arataka Reigen is a famous esper who has the young Shigeo Kageyama (aka Mob) as his disciple, who has great esper powers. In reality, Arataka is a ConMan who has no powers and [[MoochingMaster only uses Mob to manage real spirits]]. Subverted since Arataka is a father figure for Shigeo, teaching him to [[WithGreatPowerComesGreatResponsibility use his powers correctly]] and [[HumbleHero not think they make him a better person]].

* ''WesternAnimation/FostersHomeForImaginaryFriends'': In "[[Recap/FostersHomeForImaginaryFriendsS2E1TheBigLablooski The Big Lablooski", Mac - after being kicked off Madame Foster's bowling team in favor for Bloo - gets lessons from an imaginary friend named Bowling Paul, who supposedly won all the trophies on display in the bowling alley. But when he tries to put his lessons (which are mostly of the "one with the ball" variety) to practice, he ends up wrecking the place. Turns out Paul was the imaginary friend of the owner, who won all the trophies, and Paul himself [[KnowNothingKnowItAll has no bowling skills whatsoever]].