Ok were to begin? First of all, your itunes files are in your music folder... Did you even attempt to search for them before commenting? Let me be a little more specific, click the icon that says FINDER, then click the icon on the left that says MUSIC, then click the folder named iTUNES, then click the folder named iTUNES MUSIC. There they are! If you were referring to drag-and-drop music into the iphone directly, please keep in mind that this has NOTHING to do with the OS and that you need a UI program to sync music with Zune too...
Ok next. Your mouse is slow? Why don't you adjust the settings? I'm guessing you don't know, if you press an icon called "system preferences" you have a lot of nifty options! Among those you'll find "mouse". Press that and you'll be granted the option to make it faster. Please notice my hint of sarcasm, this is just retarded. You're blaming an OS for your own stupidity.
You want to burn data to a blu-ray disk? then why exactly did you buy a computer that doesn't have a blu-ray disk burner? I find that a bit retarded. You do realize that not all computers have blue-ray players right? You need to do your research on before you buy. If blu-ray is really that important to you, then I see no reason why you bought a computer without a blu-ray disk burner, you should have done your research.
I import avi movies all the time, I bet you didn't google it before posting did you? Of course you need a third party plugin, but then again windows is chuck full of third party stuff. I hardly call this avi problem an argument, you could have also just as easily converted the file to something else, if your paranoid and don't trust third party plugins...
You want to play computer games? I'm sorry but I just find this one hilarious every time I read it. Are you by any chance 12 years old? If your old enough to play Crysis your old enough to get a job, move out of your parents house, and get yourself a girlfriend. People still game on their computers??? But sure, everyone's entitled to do what they wish. But it ask you, why on earth would you buy a mac if you want to play games, it sound rather silly doesn't it? If you want to game on your computer (and make yourself a girl repellent) why did you purchase a mac, only to whine about it now? But don't worry 99% of the computer using population have matured to a level where they don't need to game on their computers, they can actually be productive with them! I suggest you do the same.
The only thing you proved with your post is that you're an idiot. You bought a computer without a blu-ray drive but expected it to burn blu-ray disks. You bought a computer with an OS with very little game versatility yet you want to play games with it? Do your research, macs are great computers, but they aren't for everyone, because everyones needs are different.