You signed up for the product they were offering. They aren't offering a product that gives publishers control; they never have. The deal is, they sell the ads, you place the code. They have no need or interest in offering a different product to publishers. It's not supposed to be a bid/ask marketplace for publishers. They don't think of themselves as an "ad agent" for you. You are not the customer or the partner.
I realize that people want to vent because they get frustrated with Google, I get frustrated too. But I see it for what it is. It's not even worth getting angry about. It's purely a business decision. Nobody's forcing us to use AdSense; to accept the 'deal with the devil'. If I want to make more money, I have to do more of the work by selling my own ad placements (and I am). Individually, our class A websites aren't worth a rat's furry behind to Google, and they don't care if we remove AdSense because there's ten more sites to replace each and every one of ours.