If you’re referring to Lemmy, this is what I do:

1. Unsubscribe from everything.
2. Add all the communities you’re interested in.
3. You will reach the end.
4. If you feel you needed more content, go to All (or whatever it’s called) and browse through a few interesting posts and subscribe to those communities.
5. Repeat when needed.

Eventually, you won’t need to be adding more communities and you’ll still be reaching the “end” of the doom scrolling.