As Taobao customer service, what kind of customers do you hate most? Why?

I hate customers who ask blindly. When shopping, customers like to choose cheap ones, but they want good ones. They always make a fuss about finding things. For example, a girl who bought overalls last time chose a pair of trousers for more than 40 yuan, and asked that the trousers should not fade or stick to hair. Clearly explained that the price would fluctuate slightly, but it disappeared after washing twice, and she kept saying that it would not fade, but it was not sticky.