Most people just have a very limited economic understanding. They can't comprehend anything more complicated than "product sucks, merchant is evil."

Psychologically, they also never admit they're at fault themselves.

People love swiping, but hate being swiped upon. Renters love complaining about prices they are willing to pay – and so on. How many consumers factor in customer support when choosing a carrier? None. They choose on price and then complain when the support sucks.