I would say its in part the vested interest in other platforms, but mostly because its Apple.
A decade ago i disliked macs, mostly because they were irrating to use, and their Hockey puck mouse.
Macs died out and that was all good.
They made the ipod. Its great hardware, and was innovative at the time and for a few years after.
Then there was a decided shift to what i consider evil apple. Before where i disliked it over preferances, i now hate it for its ideals.
The iphone came out, you couldn't purchase the hardware except by taking a 2 year contract.
The istore was shown to be the only way to get apps onto the iphone, and apple controled every aspect of that. Control over the apps you installed on your phone was removed.
Lets not forget that the developers using the istore, have to deal with the most retarded systems, my favourite being if a user returns your application you have to provide them a full refund, however the 30% gross sales tax that apple took, they still keep. How is that fair?
Then theres how they prevented any open standards for devices using their itunes. Doesn't matter if it was 100% compatable with itunes, if it wasn't made by apple, it was compatiable. Apple even released an update to itunes just to screw over the compeditors. You can say its in apples rights to do so, and i'd agree, but your not winning any hearts for doing so.
Then theres the rewriting of the iphone/ipod developer EULA, that pulled the rug under adobe, and gives even less freedom to how apps are developed on those products.
Google has been denied any use of analitics for its advertising, meaning its not going to be able to target adds very effectivly at all, making them less cost effective. Apple of course doesn't have that problem, and they have started up their own advertising business for the phone. Of course when google does analitics on ads, its evil. But when apple does it, its not a problem...
Finally as announced last week, apple are dropping support for java, in a move i expect is only the start of what they are doing to adobe.They also are creating OS features for apps that are sold their their istore.
All this to me, shows an orginization that is activtly undermining the freedom of current machines, in an attempt to control it all. If apple had their way, you won't be able to buy a dvd machine without it being made by apple. Otherwise it won't plug into other apple hardware you have (they'll forbid it), you'll only be able to download dvds from the apple store itunes, and browsing the web will be "optimized" for safari only.
Put shortly apple is working to put their fingers in every pie, and shaft any potental compertition.
Now you can claim that its all astroturfing, but go back a decade, and Microsoft was hated for excatly the same reasons. I think MS have since "mellowed" out a lot since then, and a lot of the hate regarding MS has disapated.
I disliked macs because i thought the machine was annoying to use and a toy. That was my preferance.
I HATE apple. I dislike the mac os, but i hate apple. What they are doing will destroy a lot of what i most enjoy with windows machines. Even the ability to build my own machine and uprade as i see fit will be taken away from me if apple have their way.
Apple has a lot to answer for, but i suspect the only answers apple is looking to give are to its shareholders over its quarterly earnings reports over how much money it made from people who don't give a damn and just want something shiny to play with.
Finally thing i'm going to restate.
There are macs, and then there is Apple.
I still dislike macs, and i'll dislike them even more in the future judging by apple's intentions. But i HATE Apple, and what its openly trying to do. You'd have to be blind not to see its trying to control every digital aspect you use.