Well that's a very subjective statement. So easy to criticize when there's no objective standard. I think a more useful observation would be that most of the designs are dominated by one or more completely non-interactive visual elements. Function follows form, which nowadays annoys users more than simple lack of artistry or visual appeal. I'll say that from my own subjective POV, most of the designs are interesting or beautiful in some way; in the sense of a painting if not a website.

not sure why you got down votes. some of the examples, i agree with you, aren't pleasing. quite a few are.

it's been a great tool to show beginners, imo. it clearly demonstrates the effect/power of CSS on the aesthetics of a site. the fact that some examples are "so ugly" can be used to convey that impact...