Task: Determine the prevailing emotional tone of the tweet, categorizing 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 most accurately represent the tweeter's mental state.
Tweet: Absolutely hate the Apple Watch iOS 10 update. Completely buggered some of my apps, including Spark. Awful interface, too. #grim
This tweet contains emotions: 
anger, disgust, sadness