Such a person does not hold in high regard the decisions taken by a group (not a team) of people. She believes that groups tend to be anarchic and don't serve their purpose.
An example would be – for outings with friends, this person will not like planning it with the group since they will mess it up.
Therefore, this person has convinced herself that when more people are involved with something, it will be worse. She distrusts crowds instinctively basically.
Best Answer
I'd call that person a