Here is the author's list of gripes: On OS X this is especially true: OpenGL implementation has fallen behind the competition, the filesystem desperately needs

Here is the author's list of gripes: On OS X this is especially true: OpenGL implementation has fallen behind the competition, the filesystem desperately needs updating, the SDK has needed modernizing for years, networking and cryptography have seen major gaffes. And that’s with regards to the under-the-hood details, the applications are easier targets: it’s tragic that Aperture and iPhoto were axed in favor of the horrifically bad Photos app (that looks like some Frankenstein “iOS X” app), the entire industry have left Final Cut Pro X, I dare not plug my iPhone in to my laptop for fear of what it might do, the Mac App Store is the antitheses of native application development (again being some Frankenstein of a web/native app), and iCloud nee MobileMe nee iTools has been an unreliable and slow mess since day one. I've found myself thinking along similar lines. The two biggest offenders in my opinion are (1) feature bloat and (2) poor UX/UI decisions. iTunes is a prime example of how the confluence of both can turn a relatively simple and popular app into a quasi-unusable nightmare. I've also noticed a lot more freezing and kernel panics on my iPhone, to the point where I've stopped updating the OS for fear of what might be introduced in the next version.