Rumble Red: We don't have X on myyyyyy planet (rumble)...
Crack Stuntman is disliked by a lot of fans because of his out-of-place character concept (the voice actor of an in-universe cartoon character) and heavy focus during the site's later years.
When RWBY was first released, Weiss was disliked by many fans for the following reasons: 1) She was both a Jerkassand a Flat Character, resulting in her spending the first 7-8 episodes being arrogant and needlessly cruel with no other visible facet to her personality; 2) The characters she was insulting were far more sympathetic than she was; 3) The conflict she caused within the otherwise Badass, interesting group of protagonists took most of the first season's screentime to resolve, and took away focus from compelling, likeable characters such as Blake and Yang; and 4) Her canon personality was nothing like whatFanonhad predicted it would be. (That last part was not actually the fault of Weiss or the writers, but, well- it didn't help.) This was balanced out later- she got Rescued from the Scrappy Heapeventually; other characters did not tolerate her bitchiness, and said so frequently; both Weiss and the things she said were often Played for Laughs- but her presence was enough to make the first season very annoying to watch.
YouTube user Benthelooney, known for his ranting, kept his videos fresh by adding in new characters. A video "Ben Rants: Marvin Marvin", played this trope by adding in a character who was seperated into two halves from his comical "salute" on Fred: The Show, which in this video is now known as Neb.
Jules, due both to poor acting and her behaviour resulting in the capture of Bree. In fairness, the entire arc had to be hastily rewritten when the actress playing the original "new girl", Sam, dropped out at the last minute, and Jules' actress was brought in in a desperate attempt to salvage the arc.
Mallory also comes in for a fair bit of hatred, due to getting between Daniel and Sarah, then not being seen to actually help the team in any way, then being seen kissing her teacher. When fans voted her off the show, she didn't exactly go quietly either, becoming alarmingly stalkerish in her behaviour.
Two of the most notable Scrappies are Liam Black and Carson Baye of v3 infamy: Liam Black for being an out-of-place combination of Large Ham and God-Mode Sue (note this is after the site put an emphasis on "realism"), and Carson Baye for being Don't Explain the Joke incarnate, thoroughly ruining any subtle shout-outs with an OOC comment along the lines of "In case you didn't realise, that was a [insert anime here] reference". Their deaths partially made up for it though; Liam's death being quite sad and Carson's darkly hilarious and a Take That against his entire character.
Blood Boy, one of the main villains of v3, also became this mid-V3, possibly due to the influx of new handlers and the rise of the belief that the game should be more realistic. Being the most ridiculous and over-the-top character concept of V3, he was quickly shunned.
Melvin, the brother of the Joker received a decidedly lukewarm reception compared to Doug's five previous characters. Thankfully Doug quickly caught on and joined the people mocking him.
Douchey McNitpick was supposed to be this when he first showed up, but he was FAR too annoying for the entire review, showing that when the Critic wants to be annoying, he is FAR too good at it. Even though the Critic kicked his ass at the end, the fans still hated him, probably because he was supposed to be an extreme versionof hisBroken Base. This was fixed during the Next Top 11 Fuck-Ups when he was made a lot more comical and pitiful, including implications that he dresses in drag and masturbates to pictures of the Green M&M. He returns in a Screw Ups vid for Atop the Fourth Wall in true annoying form, only to get punched in the face by Linkara in the end. (as well as in a video by The Nostalgia Chick to pester her)
Rachel eventually left to pursue a career in California and Tamara was brought in to replace her. Tamara did not get an all too different welcome from viewers, despite her being different from Rachel, though she still fulfills the female role on the videos now.
As for other TGWTG critics, The Spoony One found his own Scrappy when he introduced Spencer D. Bum, his own take on Doug's bum character, as part of a throwaway gag in his Dirty Harry review before returning as one of the clones in his Clones of Bruce Lee review. The backlash was immediate and incredibly venomous, stunning even Noah (who thought people would recognize that he wasn't going to be a permanent addition to the cast), and he considered simply killing off the character. To his credit, Spoony immediately picked up on the backlash, with one review where he mentions how much everyone hates Spencer...and then cuts to Spencer holding the camera, whimpering slightly, and solemnly walking away. More recently, in the lead-in to his Final Fantasy X review finale, Spoony had Spencer get killed off (by Black Lantern Spoony), something he'd been talking about for a while. He also managed to do it in such a vicious way (tearing his heart out through his CHEST) that most fans were crying "Alas, Poor Scrappy".
Film Brain. His hatedom mainly came from his denigrating the golden calf that isEquilibrium; he lampshaded this when he needed to take a hiatus for personal reasons, creating a parody video where Doug Walker calls him "that Equilibrium douche" and "fires" him to explain the absence. Upon his return, he's tried a lot harder to redeem himself, with varying degrees of success, but so far so good. Lampshaded by Linkara by the commentary for Warrior #2-3, where Dr. Insano-Film Brain won all his fights in the clash at the very end.
Pretty much anyone who's had a storyline in their videos post-Kickassia is getting Scrappy treatment.
The Distressed Watcher, to the point that TGWTG fans petitioned to get him off the site (it didn't work, but he eventually left anyway). The Nostalgia Chick, Film Brain, and Jesuotaku even said that they didn't like him.
Gamespot has "Annoying Characters" stamp in their video game reviews to mark the presence of these characters in their opinions.
Not really a character in general, but a site, Teefury sells $10 shirts daily which are focused on pop-culture. However, Doctor Who shirts are pretty much too popular on the site where people who don't know who Dr. Who is or finds it overrated tend to get annoyed by the selection.