He's about right but it's not really a ground breaking observation.
Though I agree with the sentiment, I'm not sure Linus carries much authority in speaking about social media.
Personally, I think it's a shame big social media is such a general disaster, because I've always had a good experience on Facebook and Twitter.
youtubers/ig accounts are very open about the effects of social media, maybe you should check some other sites to see HN... isn't that unique in this view