The first thing is this primal "everything microsoft does is evil" reaction. The author tries to rationalize, but in the end it's just "well IE9 is bad because it can be good for Microsoft".
The use of fallacies such as "most of them are probably Microsoft fan boys" is also quite irritating. People disagree with you? Fanboys! Blinds! Fools! Heretics!
Then, the article ends with the strange argument "IE9 should be cross platform". Should Microsoft port all their clients to other plaftorms? The goal with IE9 is to provide Windows with a as good as possible browser.
Yes Microsoft did play the embrace and extend game and we should thank them, because frankly, IE6 introduced a lot of useful features back then. The world changed and I don't think such approach would make sense now.
The real thing to be angry about is when they decided to stop development on IE.