What is so bad about Meg Griffin?

In your opinion do you feel that you are prettier than Meg Griffin?

That is irrelevant, but no, I do not. Being a fictional animated character, Meg never ages. Assuming an episode never calls for it, her skin will feature no blemishes, scars, zits, or anything that could be considered negative by most people. For me, such things will likely be inevitable.
In this light, Meg Griffin has an advantage over all real people. I suppose in that context, I ought to compare her to an ugly animated character if I wish to prove my point that she is not an ugly person.

edit:
Upon searching for "ugly cartoon character," the first result is this image:

 Spoiler

I am not going to post the smiling_meg.jpg again, but from the previous image it is rather obvious that Meg possesses none of this boy's traits. His teeth are in no way symmetrical; his skin has splotches of red distributed in random places; he has an obvious gut, and his band-aid indicates potential scarring. Not to mention, the bomb in one hand and the middle finger in the other indicates that he is kind of a dangerous pimento. Meg is not any of these things, unless one counts her cutting as dangerous towards herself, which would be true. Regardless, she can certainly not be seen as a bad person, and most of her negative traits are a result of her abusive family. In that light, the same people who ridicule her for her flaws are responsible for those very same flaws, making the whole topic all the more depressing.

Regardless, none of that has anything to do with her looks. Either way, I feel that I have proven that there is no objective reason to call Meg ugly based on the way she is portrayed (visually) in the television show.