When was the last time you read an article about Twitter's "algorithms" screwing people over? Hurting businesses? Affecting users?
When was the last time you saw that LinkedIn was finally punishing spammers, or tweaking their platform to reduce abuse of profile crawling?
Facebook is a so-called "shit-show" because they aren't afraid to test, to experiment, and to change their winning equation. Google is always "changing their results" because they constantly change their algorithnms in order to optimize towards quality results.
Facebook and Google are not afraid to fail.
Twitter and Linkedin are afraid to fail. They are afraid to do BIG tests.
Big tests keep big companies alive. If you think small, you'll eventually be a small company.