With all due respect, you really don't have a good picture of what you are talking about.
Your situation is unfortunate and we've all been supportive, but I have done business with car dealerships for many years and I can tell you first hand that most of them are run by very honorable businesspeople in a field that it is increasingly difficult to make a living in.
Its a two way street, and when you are a salesman with a family to feed and work on 100% commission and a customer comes in with a Edmunds printout trying to take every dollar of the whopping $300 you'd make by selling him a car...you might over time get to a point where people would think you are nasty and underhanded too. Its a two way street, and car buyers give it back to car dealers as good as they get it.
People aren't interested in a fair deal that benefits everyone anymore.
That is exactly how car dealerships would like to do business, however most consumers don't care about customer service and have zero loyalty, so they will leave the dealership that has invested time and effort into helping them over $500. Over time...salespeople start to expect thats going to happen and start cutting out the customer service, even when they have a consumer who won't actually treat them that way.
The real reason all these dealerships are closing though is because detroit automakers are cancelling their franchise agreements, in many cases with dealerships that are very profitable.