On Instagram, I rarely if ever look at other people's stories or posts other than a few close friends whose happiness can make me feel happy. But I do post my own and receive psychological validation when other people react positively to them.
LinkedIn isn't even a social media for me. It's a place to dump facts about my career. I don't read the feed.
My Facebook feed is just various memes trying to be funny. I look at them and laugh occasionally.
There's just no competition aspect for me on social media.