Task: Assess the emotional content of the tweet and classify it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's mental state.
Tweet: Trying to make a #better_world is #depressing when it's a #failure -__-
This tweet contains emotions: 
anger, pessimism, sadness