merely exposing your own feelings. (Is that what you meant?)

Yes, in that case it is. Facebook is forcing us to stare in a mirror of our own mistakes and failings. We should fix them and not avoid them. Unfortunately the mirror is crooked. It only shows the apparent best features of a person, and it doesn't tell who are we supposed to compare to. There are always people who are (or appear) more successful; Facebook makes them visible to anyone as if they were the average case and not the rarity, what they really are.