Underneath all her bravado, Gia clearly hates herself. (Hence all the work she’s had done). This is 100% why she is hateful to others but she is not the sort who will do work on herself and change. She is very immature. She acts and talks more like 15 than 35. Scott is a fool if he doesn’t run for the hills. He is rich, successful and quite good looking so I hardly think he’ll have trouble finding a woman who will at least be nice to him.