Jealousy
There's a reason it's a sin. It used to be "thy shall not covet thy neighbours Ox" so in a sense this was all about keeping up with the Jones's. But on social media these days it is so easy to find someone taller, thinner, richer, more beautiful, more intelligent, more successful, liked a lot more, with more followers, online friends, and LinkedIn connections. And there's no doubt you are better and more deserving than them. Ultimately it is all futile. The people above you are better than you, so are the ones below you worse? So when you make it to the top is everyone behind you less than you? I don't think so.