user-hostile 

A play on the common term "user-friendly", a user-hostile design is one that is, deliberately or accidentally, difficult or cumbersome for the intended user.

Often used derisively to describe the competition.

We intend to improve upon the user-hostile design of your existing sales tool.

Some say that the user-hostile design of the original QWERTY keyboard was an intentional effort to slow typists down so as not to allow them to jam the mechanical parts.

user-hostile by jfkelley June 16, 2009

user-hostile design 

The opposite of "user-friendly" design, it defines the likely product of design work that does not include continual involvement of users in the requirements and design process.

The user-hostile design of the user interface for this product resulted from a design attempt by the developers with no style guide and no user-centered design methods.

user-hostile design by jfkelley February 8, 2012