It could be Apple hate, or, it could just be showing weaknesses in the Apple ecosystem. It could be self-righteousness, or it could just be reporting the reality of a situation. Don't be so quick to conclude one way or the other.
Apple have done some great things in the past, I'm sure we can all agree. You've certainly mentioned a few. It doesn't mean they're perfect, nor any other system out there. They've still got problems, and this Fear of Apple appears to be one of them. It can only lead to the downfall of Apple, so it's actually in their best interest to air the issue and possibly get a resolution out of it.
As for The Linux Desktop, technically speaking, it's ready. Been that way for years. Gnome and KDE deliver on the Desktop Experience well enough, I'd be comfortable recommending them to my parents. In fact, I have. My father uses a Gnome desktop, and he's fairly below average when it comes to computer literacy. The one thing holding back the Linux Desktop is marketing. That's where open source is the weakest. Convincing others that they need this product