1.) she's pretty messed up. hollywood at a young age does that to people, as well as adolescence in general.
2.) when you take a picture of ANYONE at that high a resolution and zoomed in so close, they will bad. you can see every pore and, in Lindsay's case, wrinkle. Jessica Alba and Megan Fox would have looked pretty bad under those conditions.
I don't think it helps that those pictures are huge, it just magnifies everything. But I think her hair makes her look terrible, she's not meant to be a blonde. And her eyebrows are still their natural color, which looks weird with her hair.