You want to learn the hard way? So be it. When you first begin working at a customer service job , you want to help every customer, and help them have a positive experience at your store. Once you've been there a while, and talked to a Karen or 3, you begin to realize that many people simply cannot be reasoned with. You might be a perfectly logical person, with a perfectly reasonable answer to the customer's queries, but they will not care. Customers will still blame you for things that aren't…