I know - it's exhausting.
All social and news streams are absolutely being flooded by American politics right now. It's mad and crazy stuff, but there's only so much someone can take before it really starts to affect ones mental state.
And Lemmy partially started as a not-reddit, so I guess it's normal that people come to vent.
So - positive stuff you can do!
Subscribe to more communities that do interest you. Leave less space for the other stuff to come in. You can also block communities from your main feed very easily if you're being given stuff you don't want from them.
Youtube (with adblock) is hardly affected (or if it is, I don't see it). That brings lots of interesting and creative content.
Going out into the world if you're able. Reconnecting with nature, and also being reminded that people, by and large, are usually nice to you if you're nice to them.
And I've been picking up old games and playing them more. Escapism is not such a bad thing.