I guess each social media is gonna have it's own pros and cons so it's hard to give a general answer, but typically it's something I'm not into and as far as the likes as Facebook and such are concerned I only really see them being useful if you're trying to promote a brand or business. There are plenty of IM services for keeping in touch with people that don't try to lock you into infinite amounts of complete nonsense with an endless scroller.
Plus idk, I think at some point every human needs to be humbled into realizing they're just one out of a few trillion, social media very much makes you feel like you're the star of your own show and I think that started having a negative effect on society a long time ago