1) No control of what posts you see. Ideally it should be everything sorted by date, with some optional filters. Instead FB decides on its own what I should see.
2) It's designed to create echo chambers, to divide people, and propagate identity politics. I had otherwise reasonable people to get offended because I said we should listen to the other side and address their arguments, not call people "nazis". Guess what, I got immediately labeled as a nazi.
Less important reason is tracking, though that can be defeated by browser extensions.
In the end, HN and Reddit are far superior to FB.
It is designed to promote and exploit addiction, egocentrism and antisocial behavior. Its use is linked to depression. It is intentionally used for manipulation and political gain. It is intentionally used to spy on its users and invent new ways to violate privacy.
It monetizes on people’s attention and so tries to extract as much of it as possible. This is disastrous, especially for kids.
Same reason Google has fallen a bit out of favor here. All decisions revenue driven versus customer focused.
Bait and switch basically. Not a new trick.
The company: Taking great engineers that could be working on something to better our world, but employing them to work on what is essentially a huge waste of time.
The product: It's essentially a way to show off, and exclaim your opinions without having a two sided conversation. And because it takes up people's free time, and it's easier than having legitimate conversations with others, people are less likely to converse with eachother. Also the feed isn't honest. A constant bias in information I'm being fed, will eventually result in a bias of my own opinions, and I don't care for being manipulated. Third, I don't want to see everyones filtered, ideal representations of themselves. It's weird, and not psychologically healthy for everyone else to have a skewed image of everyone else's lives.