Folks who work in the customer service sector will know very well how difficult it can be dealing with the public on a day-to-day basis. Not so happy customers combined with demanding bosses and little overall respect can really take its toll on your self-confidence. Even the job itself can cause a loss of self-esteem, especially if you feel that you should be in a better job. However, just because you are working in customer service, there is no need to feel bad about yourself.