Indeed, I find that aside from there just being too much media to consumer, there's also a factor of available energy. What I notice often happens is that browsing stuff like social media requires less mental effort than reading or even playing a game. So, you kind of just do it mindlessly when you're bored, but then you end up regretting not having spent the time doing something you would've found more meaningful instead. It's an intellectual equivalent of eating fast food instead of having a proper meal.