Designers are ruining software in general. iTunes, the iOS music app, and Google Maps are just a few pieces of software that started out relatively usable (if not exactly stable in the case of iTunes), and have been iterated and stylized to the point where I routinely get enraged by them. At least Google Maps has walked back that terrible accordion thing that literally drove me crazy. I basically think design is like…
Moreover, developers are ruining software as well, just in different ways. Many developers focus on getting the internal design (design patterns, architecture, database design, whatever) of a software product right but tend to neglect the external, user-facing design because "UI is just a minor detail" real engineers can't be bothered with. Just have a look at applications like SoapUI or pgAdmin. They do a great job in terms of functionality but it's obvious that good usability wasn't exactly one of their requirements.