Here's the thing defined:
perfectionist \ˈpər-fikt-sh(ə-)nist\ noun or adjective
Used to describe or pertaining to one who gets frustrated with themselves, others, and situations that don't meet a standard that said person has decided is flawless. The root of much of these people's frustration is that they think they're God Almighty, the Creator of the Universe. They have displaced him as author and ruler and have set themselves up as king. There is a constant war going on between the idea they have in their head, and the reality that they cannot meet their own expectations. They think so highly of themselves that they are actually surprised when they make a mistake, and thus become incensed. With their self-diefication comes the right to get angry with others who don't live up to their standards and express their condescention in a haughty manner.
See also \ˈjā-sən\