@burcidi-- I don't agree with you about the shadow archetype not being negative. It is negative, it's terrible and that's why we repress it.
Jung believed that each person has a light side and a dark side. The dark side, or the shadow, is everything that we dread to see in ourselves. But this doesn't change the fact that it's there.
The shadow includes emotions of destruction, anger, jealousy, hate and so forth.