Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: #ADP's #ezlabor web portal has to be THE SLOWEST web app I have ever had the displeasure of using!!
This tweet contains emotions: 
anger, disgust, sadness