Please, people have been calling Apple's interfaces ugly for years. Just like Aqua and brushed metal, your opinion is your opinion, and there are plenty of other people (like me) who don't have a problem with it.
Now, if you want to talk about lack of functionality, you'll have a leg to stand on. I personally am not happy that the calendar list is now only accessible through a pop-up that disappears as soon as you mouse away from it. I frequently need to show and hide calendars and this makes that task a pain in the butt. However, I'm not going to go complaining about that here, where my opinion makes absolutely no difference. I'm going to visit the Apple feedback page.