Hi mattress310.
Welcome to our Mattress Forum! 
Thank you for sharing your shopping experience and for your caution and “encouragement” to pressure companies to disclose the materials used within their mattresses. I completely agree that a mattress is only as good as the quality of the materials inside it regardless of the name of the manufacturer. More than anything … this site promotes transparency and the ability of consumers to find out information that validates the claims that are being made about a mattress that they can verify for themselves. Smaller mattress manufacturers and better retailers and sleep shops in general tend to be much more open and transparent about the materials they use than the largest manufacturers … and for those that do this their quality and value is self-evident to consumers that have learned some basic information about the quality of foams and other materials.
Along with the newer “bed in a box” explosion …the drive for corporate profit at the expense of quality is what drives the industry even though there are literally dozens of smaller manufacturers who continue to build higher quality mattresses that cost less than their competition’s lower quality and less durable products. Smaller manufacturers and like-minded retailers that maintain quality standeards offering better value products control so little of the market that they remain mostly hidden under the wave of advertising and marketing stories. Most consumers literally don’t know that they exist, even if they are within the same city or general area … they are buried or lower in the search engine results and … even if they did come to consumer’s awareness … most of them tend to believe that the “brand names”, reviews, and the “stories” that they hear advertised are somehow better than a local alternative who are completely transparent about the materials they use and very often take the time to educate and inform the consumer. This is a big part of the reason why so many smaller manufacturers have disappeared over the last decade.
There are more detailed comments about some of these unfortunate trends in the industry towards lower quality materials and mattresses in post #3 here and in post #12 here and in post #404 here.
Hopefully, your post will inform others and add a deeper perspective to the mattress shopping process in general.
Phoenix