April Kepner – Grey’s Anatomy
Played by Sarah Drew
While April did ease up later in the show, her initial behavior tainted her character for good. When she became the chief resident of Seattle Grace Hospital, she somehow continued to get increasingly more boring and self-righteous.
She did at least make the other characters seem more interesting.
Oliver Trask - The O.C.
Played by Taylor Handley
It took six episodes too many for creators to cotton on to the mistake that was Oliver. Trask's brief time at Newport Beach involved him faking both a girlfriend and a suicide attempt. The villainous little attention-seeking loser then topped it off when he held poor Marissa hostage.
Talk about needy. That name should never be mentioned again.
Wesley Crusher - Star Trek
Played by Wil Wheaton
Any character praised for having "good behavior" is going to make bad TV, and that's guaranteed. Crusher's tendency to make everyone feel a little inferior is what grated fans the most. Even the actor portraying the character admitted to not being particularly fond of him.
Luckily writers read the room and banished the Wesley Crusher to the trash can.
Dawn Summers - Buffy the Vampire Slayer
Played by Michelle Trachtenberg
In Dawn's defense, she did get dealt a bad hand. Relentlessly abandoned by everyone she loved, Dawn had issues. And at 14, she discovered that she had been living a complete lie. It was clear that poor Dawn could not get a break. While her character begged for sympathy, it was hard to give it.
Perhaps if she begged a little less, she could have been a little more tolerable. Sulky and whiny Dawn then developed a shoplifting habit. Perhaps it was a cry for help. Still, fans just sort of lost patience for her.
Ned Flanders - The Simpsons
Voiced by Harry Shearer
The bible-thumping Ned annoyed the heck out of Homer and a lot of fans. Starting out with a sort of 'cute' overly sunny outlook on life, Ned later got a little intense about his beliefs, often leading him to look down upon others who didn't share his values.
It's no surprise that Homer ended up writing the song “Everybody Hates Ned Flanders,” which, due to such overwhelming popularity, even earned a Primetime Emmy nomination for outstanding music and lyrics.