For me, "doom" scrolling is what you do when there's actual doom. When there's a terror attack and you don't know if you your close ones are safe, when there's a coup, when another war in one of your countries starts. You're horrified as hell, but you can't actually do anything useful, so you are glued to the "scroll": news, hearsay, and all the images and videos that you really should not be looking at for the sake of your own mental health.