I found my way to escape doomscrolling is to never user the homepage of Twitter. Instead I have lists set up for Friend, Interests (People who tweet science / tech news), and News outlets. I then bookmark those 3 lists, and only read the first 2 unless I WANT to read the latest news. I never seen 99% of the people I'm following, trends or adverts, I just see what I want to see on the platform.