Not sure. Facebook started as a HotOrNot clone apparently, and MySpace was a flaming web design disaster for its first years before it became a nice website for niche music, but then died entirely.
Web design disaster by what standards?
Facebook was (and is) predatory but that is not what is meant by "suck". When Facebook came out, it satisfied a huge demand, and was exactly what people wanted, regardless of how you feel about it ethically.