What is an example of a poor design that cannot be used by everyone?

One example of a poor design that cannot be used by everyone is the absence of accessibility features in a website or application. If a website or app does not consider users with visual impairments and lacks features such as screen reader compatibility, color contrast options, or alternative text for images, it becomes difficult for individuals with disabilities to access and use the product effectively. This exclusionary design not only creates barriers for users with disabilities but also goes against the principles of inclusivity and equal access.