The writers of Glee don't always seem to grasp the distinction between using humor to address issues such as racism, homophobia and bullying, and merely making bad humor about racism, homophobia and bullying. It always bothered me that Kurt was the only character who really seemed to be deeply affected by the vitriol aimed at him. Tina and Mike often had to face the most nasty and racist comments from Sue, but they almost always just walked it off and are fine in the next scene we see them in (which usually wasn't until the next episode because, you know, tokenism).
I stopped watching the show before the character with self diagnosed Asperger's was introduced, but it doesn't surprise me that they would have her fit all the negative stereotypes.