People are upset because they have been using Google reader for years, for free, and they liked the features that Google had given them.
Just to emphasize: IT'S CALLED "GOOGLE READER!" NOT "[INSERT YOUR NAME HERE] READER!"
In other words, Reader belongs to Google. They give you access to it. For free. But they own it, and they can do what they want with it. If you don't like their changes, then thank them for X years of free service, and move on.
And, if there are features that you absolutely must have, then use some open source tools and build them yourself. No one could ever take that away. And you can share it with your friends, and/or license it under the GPL and let anyone use it, modify it, or improve it.
But seriously. If you keep up this level of whining about Google reader, people might get you confused with other groups of notorious whiners, like the MPAA fearmongering about video piracy, or Apple fanboys defending another crappy iPhone release.