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1. 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.
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