Good shops do exist - its just that most people dont want to pay them what they ask, which in my experience is mostly justified.
The medical equipment industry, as an example, is in a similar boat. When given the choice between an 80 lac MRI machine package, or a 3 crore MRI, most customers who dont know any better prefer the cheaper option.
They'll almost always choose the 80 lac option. Without fail, they are forced to consult the 3 crore people to come and fix their 6 tonne paper weight MRI within a few months.
Btw these prices are for remanufactured, old units - most people can't afford brand new units with warranty from GE etc.