The feed has no bottom on purpose. You have to be the one who decides where it ends.

There is no natural stopping point built into an endless scroll, because a stopping point is a place where you leave. Everything else in your day has an edge: the episode ends, the chapter ends, the meal ends. This one was designed without one, and that is a fact about the design rather than about your discipline.

Since the end will not arrive, bring your own. Decide before you open it what you are there for or how long you have, and say it to yourself rather than just thinking it. Some days you will blow past it, and it still beats feeling for a bottom that is not there.