You're partly confusing how one deals with a customer - which an opposing party on a business deal is - with a fellow employee. People don't get fired for all deciding that someone is difficult, abrasive and disruptive - which the team legitimately decided was the case for Brent.

If you go thru life with no effort into encouraging the respect and admiration of your colleagues, you won't go far. Brent wasn't "quirky" - to me that connotes someone that is likeable and odd. It isn't about looks that made Brent unlikeable - it was his aggressive and entitled manner.

You do have to remember that this show is partly a game - and cutting off any potential allies is a rookie move, and one that shows you don't have what it takes to play this game, or the real world ones. If you can't separate the "real world of business" from "The Apprentice" as a contestant, how good are you going to be at recognizing other real world limits and dynamics?