Your are a bit misleading Sir, there exist atleast the same amount of people on this world who cry against Steam for the same matter...
And the devalueing part came from inustry people not Gamers...
You see people there decrying Gamersgate, GOG and Origin sales for "damaging the industry", and yet Steam sales supposedly "help PC gaming". You see people decrying EA for making Battlefield 3 Origin-exclusive, and yet Half-Life 2 and Source Engine exclusivity on Steam is supposedly perfectly OK.
People have always something to cry about the sad thing about that is that the crying is about things which not really matter in life, for real problems we are best in closing our eyes or look in another direction
You can choose to, who would you give the monopoly Valve or Microsoft? Yes neither choice is the true one.
Steam did something right else it failed long ago, or why is it that GFWL failed long ago?(And Micrfosoft has quite some money to force it down our throats.
But here is a sad but true fact, and Steam has nothing to do with it.
DRM will ever exist in one or another form.