I think it's not so much a problem with social media itself, but rather a phenomenon that occurs when consumption points converge. Anger is great for grabbing attention, and for newcomers trying to get noticed at a converged consumption point, generating anger or outrage is just the easiest way.
At first I thought it might be a problem with social media, but it seems more like a problem that arises when groups converge in one place. So these days, I just write my thoughts on my own homepage. That way I can write my own thoughts without getting angry at other people's posts.
What a lovely idea. Maybe I should try this.
Personally, if you need a moderate level of connection, there's something called the IndieWeb. Of course, sometimes you just need your own world without any connection at all.
Either way, I think creating your own digital garden is a valid approach. Thanks for agreeing with me, and have a good day :)