Alot of people love to hate big things.
Look at all the people that hate mcdonalds, webhostingtalk, and all else.
People often go on about Microsoft being the scum and Linux ruling all.
Some people prefer Microsoft and thats fine with them.
Afterall, i'd bet alot of these MS haters are using Windows right now.
Although you do speak some truth in that sites should be optimized for IE, the CSS rendering for it is actually out of place according to the w3, who set the standards.