It sure sounds like rage! "Vile", "boycotted" and "making you feel ill", such dramatic language for one so allegedly unruffled. You might start by having the composure to produce a legible post!
They are successful, you hate that, I get it.
They are only overpriced if you don't value the product. To me they are quite reasonably priced, but then I am considering their value to me in day to day use, their longevity (i can burn through cheap laptops in 12 months) not to mention the initial cost is also offset by there resale value.
Your use of the word "closed" as some irrefutably negative aspect suggests you are more bothered about open source as a religion, than the practical use of a computing device. OSS and proprietery software both exist both have their relative merits and both have a place in the computing ecosystem. I am no stranger to open source. I support the concept of opensource, but I don't feel that doing so mutually excludes my use and/or acceptance of propritery software as a concept. I'm going to judge software by my own measure whether its closed or open doesn't have much of fundamental effect on my decision thesedays. I've been to FOSS and back, the pent up rage of being forced to use windows for a decade fuelled my view that linux was the holy grail, but as my rage softened and I started to see clearly again I started to see that linux too has its downsides. The thing is the shiny has worn off of MacOS now for me too. So I feel (note: opinion) I'm left with a fairly objective view of what works best for me, and as I said earlier the choice for me was between windows or *nix. I chose *nix, my distro of choice (because it seemed to be the one that had its shit together most) was OSX. I'm sure i will be derided for not being a 'true' linux fanboi, and mocked for being an apple fonboi, but really that comes so far down my list of "reasons why I do stuff" that I'm not even sure if it might have fallen off the bottom. Oh well, it won't be missed.
If there is some real solid reason that you want to be able to go digging around in the GUI subsystem or need source code access some other proprietery aspect of OSX then I can see your point about how 'closed' is a bad thing (for you) and you should pick something else.
I am aware of the arguments about the relative technical merits of closed vs open source, security, maintainability and even cost. They are arguments though, neither has been conclusively proven as better, so why not let the free market decide.
In closing why not just choose what suits you best and feel comfortable. If somebody comes along and makes a compelling argument why I need to shift from OSX back to (say) windows 8, my choices are to dismiss them out of hand or to listen to what they have to say, see if what they are saying makes sense in my particular use case, and if it does go ahead and try it out. I'm not saying you haven't tried OSX (I mean really tried it, like give it a year) you may have, but your post seemed to imply that there was no way in hell you would move to osx because you have something against the company. So long as thats the case then by all means boycott away, but you might want to check out that world view of yours, see whether its really serving your best interests.
(pre-emptive "apology for being selfish western world white trash". I am. I'm over it. What am I gonna do rage at the world for being born into the relative wealth of working class Britain? Fish gotta swim. Birds gotta eat. We are only human, trying to pretend we aren't is noble but ultimately doomed to failure.)