A person with no umbrella or raincoat is an example of a person who is ill equipped to deal with the rain.
While depression is a well-known illness, many people feel ill-equipped to discern between common sadness and a condition requiring medical attention.
Alan Ruck: Alan is not as familiar as Walter Koenig and Nichelle Nichols, but fans will recognize him as the ill-equipped captain of the Enterprise in the movie Generations.
Dean guessed she had been pampered and protected all of her life and was now ill equipped to function independently.
While her writing demonstrates education, most likely her background ill equipped her for the practical realities of the real world.
But the army was ill-equipped and unprepared; and Potemkin in an hysterical fit of depression gave everything up for lost, and would have resigned but for the steady encouragement of the empress.