Professor Barry O'Sullivan:

The important point about the crowdsourcing of self-esteem is that social media companies have control over how somebody gets one's sense of self-esteem. For example, a person shares the fact that his or her cat has died on a social media platform. No one interacts with that and, therefore, he or she thinks that nobody cares.

It is not that nobody cares, it is just that the algorithm behind the social media platform decides that it is content with which not many people will engage very strongly; therefore, it serves up something else instead and the person is left thinking nobody cares about him or her when it has been decided purely by the algorithm. The mere fact that kids can crowdsource their self-esteem is unpleasant, but that there are organisations that, as a consequence of profiling and trying to maximising the value of their platform, decide how to manage it is really pernicious.