Cartoon protagonists/ main characters that are somewhat unlikable. Also like always anime will be excluded. This list will be only looking at Cartoon Protagonists that are terrible. Not side characters or background characters that don't contribute much.
1 Peter Griffin - Family Guy
Peter Griffin is the main protagonist and titular character of the American animated sitcom Family Guy.
No cartoon protagonist is more unlikable then Peter Griffin... he's sadistic and downright cruel.
Oh my god, I hate modern day peter griffin - codydoestuff
He isn't that bad - Bikerninja1997
In seasons 1-7 I agree with you, but ever since season 8, peter in my opinion is the literal definition of a jerk. - GreninjaGuy
2 Angelica Pickles - Pre-school Daze
Angelica Pickles is a cartoon character who appears in the Nickelodeon shows Rugrats, All Grown Up!, and Rugrats Pre-School Daze, and is among one of the series' original characters.
She was very unlikable in Pre-School Daze.
3 Johnny Test - Johnny Test
Yep awful protagonist...
4 Billy Dilley - Billy Dilley's Super Duper Subterranean Summer
5 Timmy Turner - Fairly Odd Parents
Timothy "Timmy" Tiberius Turner is a ten-year old boy who is a fictional character and the main protagonist of the American animated series The Fairly OddParents created by Butch Hartman for Nickelodeon.
He used to be a likable protagonist but he really went donwhill.
6 Flapjack - The Marvelous Misadventures of Flapjack
MY GOD he's a terrible protagonist...
7 Fanboy - Fanboy & Chum Chum
8 Stan Smith - American Dad
Stanford Leonard "Stan" Smith is the main protagonist of the adult animated sitcom American Dad!. He is voiced by the series' co-creator and executive producer, Seth MacFarlane.
Just as bad as Peter Griffin to be honest.
9 Cleveland Brown - The Cleveland Show
I think this one is rather self explantory.
10 Tex Avery - The Wacky World of Tex Avery
? Twilight Sparkle - My Little Pony
Twilight Sparkle is the primary main character of My Little Pony Friendship is Magic. She is a female unicorn pony who transforms into an Alicorn and becomes a princess in Magical Mystery Cure.
11 Maggie Pesky - The Buzz on Maggie
Living proof that "beauty is only skin-deep" - xandermartin98
12 Karai - TMNT 2012
One minute is bad then hello where over to the good side. And incest with her brother leo no. Reboot to on the way no.
Hate her just as bad as kai greene hate her to.
Hate so much.
No this was so wrong in tmnt 2012. that's why fans stop watchiing. And her and leo.
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13 Chowder - Chowder
Like Steven from SU he's unlikable, annoying and irritating in more ways than one.
14 Power Pooch - The Wacky World of Tex Avery
15 Uncle Grandpa - Uncle Grandpa
oh gosh - BreakFastBeast2005
Very unlikable and annoying...
16 Robin - Teen Titans Go!
Robin, also known as Tim Drake, is a fictional superhero appearing in American comic books published by DC Comics, commonly in association with the superhero Batman.
17 Link - The Legend of Zelda Animated Series
Link refers to several different incarnations of the same protagonist of Nintendo's The Legend of Zelda series.
In the cartoon he's a winy doofus who never shuts the hell up. - egnomac
18 Chum Chum - Fanboy & Chum Chum
19 Pickle - Pickle and Peanut
20 Allen Gregory - Allen Gregory
21 Steven Universe - Steven Universe
I'm sorry but he's really whiny and overly obnoxious... I can't stand him.
22 Sanjay - Sanjay and Craig
I think this is a dead horse so I won't go in depth.
23 Nom Nom - We Bare Bears
24 Lincoln Loud - The Loud House
He's a more selfish and arrogant version of Timmy Turner...
25 Phil Matibag - The Nutshack
26 Kion & Bunga - The Lion Guard
27 Sway Sway - Breadwinners
28 Ben Tennyson - Ben 10 (2017)
Yeah in the new Ben 10 reboot he kind of sucks...
29 Frankie Stein - Monster High
Screw Monster High.
30 Gokudo - Gokudo
31 Pinkie Pie - My Little Pony
Pinkie Pie is a major character in the 2010 show My Little Pony: Friendship Is Magic, based on Surprise from My Little Pony G1, She represents the element of Laughter.
Just as obnoxious as Chowder and that's saying' something.
32 Rigby - Regular Show
Rigby is a character from the cartoon Regular Show created by JG Quintel. He's best friends with Mordecai (A talking Blue Jay). Together they slack around and have fun in the park. A place where they work and have the risk of being fired from.
He's not that horrible.
33 Ren - Ren & Stimpy
34 Kai Greene - Ben 10
35 Squeaks the Squirrel - Wabbit