I think she's a good looking woman who has certainly made better fashion choices as her career progresses, but I don't think blonde looked good on her to begin with. Couple that with embarrassingly liberal use of photoshop and just bad photography (sorry Ellen!) and you've got a real disaster. She actually looked like herself on her US Vogue cover and, I think, she looked quite good. Here? Atrocious.
Side Note: One of the dangers of putting people who have people who change their look dramatically, like Kim, on the cover is that when you style them to suit their current look and that look changes before the photos are released, you end up looking a day late and a dollar short. Kim hasn't been blonde for months, it just seems weirdly outdated already.