The problem is that such an article will undoubtedly have bias. The AMCs often advertise in publications like Anesthesiology News. If there is bad press regarding an AMC in the particular publication, that AMC may threaten to remove advertisements and thus decrease revenue for the publication. I also think you will get a lot of "interviews" from people at the top of these companies basically submitting "quotes" that might as well be an advertisement for the company. I could easily see an article with the following quotes:
"Sheridan taking over the business management was the best thing we ever did. Now we can focus on what we care about the most...our patients."
"NAPA has been a great working environment. I have grown in my career and am offered all kinds of leadership opportunities."
Unfortunately, word of mouth and anecdotal stories are still the best way to spread the word about bad jobs. I have perused websites like Glassdoor, and while I think the idea is good, there is not enough data on the site to be of any real use. An anonymous website that does not rely on funding from outside companies would be the best way to spread the word.