Impetuous
Acting or done quickly without thought or care
Disdain
The feeling that someone/something is unworthy of one's consideration or respect
Fastidious
Very attentive to and concerned about accuracy and detail
Haughty
Blatantly proud; showing an attitude of superiority for people or things perceived to be inferior
Dis[arage
Regard or represent as being of little worth
Patronize
To talk to someone in a way that shows that you believe you are more intelligent or better than others
Abhor
To regard with extreme dislike; to feel hatred or loathing for
Pretentious
Attempting to impress by affecting greater importance, talent, culture, etc. than is actually posessed
Scoff
Speak to someone or about something in a scornfully derisive or mocking way
Complacent
Marked by self-satisfaction especially when accompanied by unawareness or actually dangers or deficiencies. Self-satisfaction