iWork and iLife.
After iWork '09, the iWork applications had very little in the way of updates, but the Keynote and Pages applications were very capable. Pages didn't have all the features of Microsoft Word, but the typography and page layout capabilities were exceptional in comparison, and users had a fairly clear list of improvements that they suggested - mostly improvements to mail merge, tables-of-contents, footnoting, indenting, and creating indices. Keynote was excellent. Numbers was simply not what people expected from a spreadsheet and it had the most suggestions for improvements. However, by and large the apps were quite good and a bargain.
iWork '13 destroyed everything that made the iWork applications great. Not only did the UI regress, but the feature set, rather than meeting user requests / expectations, jettisoned swathes of functionality - in exchange for compatibility with iCould and the web version. The highly usable productivity software became a Google Docs wannabe overnight. Worse, the old version ceased to be available. Subsequently, improvements to iWork have included no restoration of the functionality of the product, but changes in the file format (that introduce incompatibilities with older versions). iWork took a nosedive.
iLife hasn't fared much better. iLife originally included GarageBand, iMovie, and iDVD for creating DVDs (with menus, title graphics, scene previews, and control over flow between menus - simple, but functional). iDVD is gone. Even Apple's "pro" video tools no longer support similar functionality to what iDVD provided in 2009 -- there is nothing available that can claim the same function, and you can no longer obtain the abandoned software. GarageBand has some added instruments and lessons, but at the loss of their video / podcast scoring and advanced podcast authoring capabilities. The filters are now more primitive and skewed specifically towards guitars (why?). iMovie has gone through various iterations of UI and library management changes that make moving between versions confusing and it focuses on iCloud and iMovie Theater - features almost completely unused because of their awkward implementation and storage requirements (particularly in iCloud) that are ridiculous.
Aperture, their prosumer photo database and editing app, is about to be jettisoned and replaced with an upgraded iPhoto with many of the most professional and workflow-related features of Aperture removed. Aperture will no longer be available afterward. In effect, their ceding this software to Adobe's Lightroom and their subscriber-based pay-to-play model.
A lot of people will also probably bitch about Final Cut Pro X, Motion, Compressor, and those video tools. However, I think Apple is doing OK there. They released FCPX prematurely - they needed to wait until they got FCP7 project importing working, but the changes they made were really necessary. Where they have failed is the workflow and integration points of FCPX - Motion - Compressor, and they've dropped the ball on creating optical media. There was also still some room to keep Shake in the mix.
I don't worry too much about things like Apple ID as that's more or less par-for-the-course for that sort of service these days. Nobody does it much better. However, I chafe at the idea that they are spending so much development money, time, and effort on that dog called 'iCloud'. It's a disaster of a service and it's dragging down their productivity software.