I've never, ever seen an algorithm as evil and anti-social as the one Facebook's programmers created. At one point, it was showing my family and friends a comment my cousin had made about a politician, and they started getting into heated arguments with him. And this kept happening again and again. It honestly felt like the algorithm was trying to polarise entire families and friend groups, driving engagement by surfacing exactly the things people disagreed with or didn't want to hear. During the pandemic the algorithm drove everyone insane.
At one point, I compared Facebook to a virus. It hijacked conversations, infected relationships, misled people, and distorted their perceptions of others.
instagram is still bad now that they push more ads and content from people you don't follow onto you, but at least it's only things that are explicitly posted, and it's easier to maintain multiple profiles with different feeds