Why do people hate "smart asses"?

Anonymous
The type of people who know everything, get straight A's, get honors, and like to brag about it. Companies (and people in general) never like those people. It's like they want to fail. If they are highly intelligent, why wouldn't you want that person on your team? Because of insecurities? Why blame that person for you own insecurities?
Why do people hate "smart asses"?
3 Opinion