Depending upon how afraid you are to face to the true cause of your anger, frustrated or disappointed expectations, you either get more angry/accusing/aggressive/defensive if others don’t join in your drama or you start calming down, begin to find peace in yourself the moment after the outburst and stop blaming others or circumstances for your conflicting emotions.
One way to realise and measure how much you still hold on to expectations be this either of yourself, people or life in general is to obeserve how often you still experience emotions like disappointment, anger, frustration, dissillusionment or even sorrow.