For example, the backdoors are required by government, and Microsoft is not above the government and cannot really refuse if it is a legal requirement for national security. They're not exactly designed as backdoors either - mandatory security updates are necessary to prevent the spread of botnets. There is a valid argument that users should not be allowed to stop these essential security updates. Unfortunately, there are far more changes than only security updates.
DRM is pretty much required for Microsoft to be able to get into distributing media for a fee. The same applies to a lot of the rest - it's all for being competitive in a world where Apple and Google are doing the same thing.
However, that they are all legitimate doesn't actually change that it really is malware at the end of the day and this page is pretty much true.