Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
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