This would eventually collapse to people reading articles they do not actually like (i.e. get happiness from reading), I think, maybe tragic history facts or something like that? The truth of social media harm is that it's more about humans than the algorithms themselves. Humans just tend to engage more with negative emotions. Even IRL we tend to look for intrigue and negative interactions, just look at the people who stay with toxic partners even with no financial ties, or even friend groups who turn into dysfunctional gossip fests. The only way to avoid this is by actively fighting against this tendency, and having no algorithm at all in an application helps.