The purpose of a system is what it does. "There is no point in claiming that the purpose of a system is to do what it constantly fails to do.” These articles about how social media is broken are constant. It’s just not a useful way to think about it. For example:

It relies on badly maintained social-media infrastructure and is presided over by billionaires who have given up on the premise that their platforms should inform users

These platforms are systems. They don’t have intent. There’s no mens rea or anything. There is no point saying that social media is supposed to inform users when it constantly fails to inform users. In fact, it has never informed users.

Any serious discussion about social media must accept that the system is what it is, not that it’s supposed to be some other way, and is currently suffering some anomaly.