* blocking popular and/or controversial political figures
* blocking whole list of controversial or outrage keywords
* training myself to skip tweets by outrage machine when they succeed to sneak through above two filters
* unfollowing anyone who has poor signal to noise ratio. More tweets about outrage than about anything I find useful.
With all these my twitter experience has been relatively pleasant.
I find this to be the most frustrating part of Twitter. There is a significant contingent of subject matter experts that freely co-mingle personal commentary on unrelated topics with their 'thought leadership'.
It was know as Google+, allowed people to post under different topics from the same account and also create multiple pseudonyms that one could easily switch between.
Besides, for some reason the most annoying people from Twitter and Facebook never "got it" so it was mostly just photographers, electronic enthusiasts, Linux people and gardeners (at least that was my bubble).
Edit: also frustrating: for some reason the focus of Mastodon and ActivityPub seems to be on Twitter-style interactions, at least that was my impression last I checked.