Because every time I kill a new boss or do something in WOTLK, it feels like I am beating a singleplayer game on easy-mode.
WoW never use to be like this until WOTLK.
The game feels like it's lost it's memory or something and even though all the changes are great for the majority of the people playing, they don't know what they're missing out on and how much better the game could be.
They changed the game to make it easily accessible to more people but in the process of doing that they also removed a lot of good things about the game. /cry