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.
If a social media platform doesn't offer a web client, it sucks. I'm sorry.
Also, by what metric does it not suck? Ads? Privacy? Algorithmic feed? Bots? Addictiveness?
I read the thread on metafilter, apparently its sponsored by the John Muir whatever and is for people who enjoy sketching nature and sharing their sketches, I think.
Lots of trackers? Firefox Focus mobile blocks so much that the layout is ruined