"people just suck at socializing" is no explanation at all. It is just an observation of a state of affairs. In fact, I don't think people are any worse at socializing than we have been in the past. What has changed is that our entire social lives are mediated by parasitic technologies meant to maximize engagement and our entire economic lives are mediated by a market ideology which only incentivizes maximum flexibility in order to meet our economic needs. Social phenomena do not materialize out of thin air, nor are the cause of evil wizards plotting somewhere. It is, as the saying goes, the economy, stupid.