When you hear yourself say it to someone or someone says it you, "You are an awesome person, so much better than this or that person", become aware it is not an appreciation of what is. You are not giving or receiving the praise from a place of full truth but it is a disappointment talking from a broken expectation. It is an appreciation/approval that fit the mold of an expectation which the other didn't fit. An expectation is very fragile, it can break anytime and there will be somebody else always ready to fill that expectation, once again in comparison.
Most humans can appreciate what they understand. What is not understood is feared. It is a limitation one expresses when they are unable to appreciate the unknown or perspective/action that does not fit their understanding (mold). When one breaks the molds to dwell into the unknown, a natural expansion occurs. The expanded view unfolds a new layer of appreciation for what was misunderstood or feared before.