After years of dealing with people in emergency public services and as supervisor at a discount store I have learned that there are many people who are never happy no matter what. I have learned the best way to deal with them is be nice and cheerful no matter their attitude, It pisses them off that you are happy! People would bi__h and complain and I would smile and tell them to have a nice day. Usually leaves them with nothing else to say. It took me awhile to learn this as I have a quick temper and don't back away from confrontation easily. Then I figured out that arguing with most of them is like fighting an unarmed person
. Either way, you walk away feeling better about yourself.