Specifically Facebook comes to mind. They claim they need to use algorithms for maximum engagement, which is probably true.
I still think they would be fine if they just made the news feed chronological (I remember when it more or less worked that way) and let users make their own choices about what to see. I use Twitter that way, where at least they give the option. Next door also has that option, but they automatically turn it off after (iirc) 60 days.
Of course if they weren’t just promoting things that made people upset, engagement would drop and they would be less fantastically profitable. But their users would be healthier and probably happier. I think it is valid for companies to choose to make $5 billion in profit a year over $10 billion, if that’s the cost of respecting human dignity and promoting human thriving. I get that that’s a controversial opinion.
Which ones?