And sometimes work isn't either. There will be some days when just getting through is the best you can do. Wait until tomorrow to see if things clear up. They usually do. Don't be a complainer.
Every work environment has a person who feels responsible for the role of office complainer.
Let someone else fill that role. And ignore them when they attempt to practice their art upon you. When you are unhappy on the inside, do your best to stay happy on the outside. Your inside will eventually get the point and come around. Don't join in when others are boss bashing.