At first I was not sure if the article really means exhaustion of the user, but then it says things like
"people scroll not because they enjoy it, but because they don’t know how to stop".
Sure, social media is a big waste of time, like gambling is a waste of money and drugs are a waste of health (and money), but do any of these feel "exhausting" to to user?
"Regret" comes to mind, maybe "shame". I think if platforms were exhausting to a significant number of people they were not that successful.