How to describe her?

He is so INSANELY UNLIKEABLE TO ME. The way she talks, acts, walks, it's an eyesore. I've seen rich girls behave this way but I wouldn't say it's because they are rich? In the past, well off girls like Elizabeth Taylor or rich girls like Suzanne Plachette were perfect ladies. In other words, their demeanor was not exactly the result of being rich. But nowadays it seems that they all have this godawful way of being, how does one describe this Troll Fanning's behavior?