If people are wondering why Meta is floundering, it's because Zuck had one good idea: rip off Friendster. Dude has never created anything. He even ripped off Hot or Not for his Facemash thing.
To be fair, taking someone else's idea but doing it better, is how a lot of businesses work. Google wasn't the first (or fifth) search engine and primitive forms of cloud storage have been around longer than you'd think.