Is it painful for us to have the sarcastic bubble? No. It's there for protection. Is it painful knowing we can't trust people? Yes. Too many times, when I've trusted people, they have let me fall. This is pretty common, but because of our idealism, we get pretty hurt over it. We can't understand how people and the world can exist the way they do. It's the inner Ni-Se conflict, not being able to separate one from the other. Eventually, they have to reconcile with the way things actually are, and learn to be less idealistic. I think the sign of an INFJ who made it through that process OK is that he/she is working to implement his/her vision and make the world a better place, one step at a time. And that they feel it is enough to what little they can. This can take decades, though.
Maybe INFJ "pride" to an extent. Some of us get shunned from the time we are kids, so I guess there is a sense of pride and belonging when you find that there are other people like you. It's more about comfort than feeling better than everyone, though the latter is obviously not exempt. Some people think that because we are rare, it makes us better somehow. That's all subjective. Use this information well!