You might remember a famous movie from many years ago that contained the line "Many of the truths we cling to depend greatly on our point of view."

There is a lot to learn in life from learning to understand the point of view of other people besides yourself, and learning to speak about subjects from different points of view, without leaping to brand a perspective "right" or "wrong," as you are doing here.  And if you want to do business you certainly have to be able to understand the point of view of your customers.

Being unable to understand a point of view that differs from your own, and punishing people with angry outbursts and namecalling makes you a very dangerous person to deal with, frankly.  I personally consider angry outbursts to be a form of temporary insanity.  When you are angry and there is adrenaline in your blood stream you are not thinking rationally, and the things you are thinking of doing or saying will usually make your problem worse!  If you learn to relax when you are frustrated and forbid yourself from choosing to have an angry outburst, over time you actually redirect the way the neural pathways in your brain are connected.  Instead of reinforcing the habit of anger and irrationality, your brain directs its efforts and its wiring toward being better at problem solving.  Even when somebody has wronged you this is absolutely invaluable, because in the end you really can't force someone to make things right with you by calling them names.  All you will do is make them want to get away from you as quickly as possible (and they may choose to punish you with anger, as well), and you make yourself look bad to everybody else.  There are better ways to solve your problems, and you can tell the facts of your situation to the world, without losing it and getting irrational.