Why did Vista get bad ratings?

I have read reviews of Vista quite abit. In my Pc magazines, online, heard reviews at college too. I love Vista. I could see how if someone has been using XP for a long time, Vista would be hard to get used to. For my degree during winter quarter, I was required to take a class on Vista. It was great. Vista is so much easier to use than XP. I have been using it for about six months now. At first when I upgraded, I was frustrated. But now, I wouldnt go back to XP. I have Vista on all of our computers. It is just so user friendly. Just playing around with it, you can do so much. The kids like it better too.