At one point Donald got on my nerves because I couldn't understand what he was saying half the time and he has a crappy personality, but Donald is an unoriginal answer, I gotta think about it more...
Frollo. The guy is such a douchebag and completely unlikeable. A character that I प्यार to hate. Sarousch was a hell of a lot और likeable and was funny too.
If डिज़्नी Channel, डिज़्नी XD, या डिज़्नी Junior characters count, then, I say अचार and मूंगफली, मूंगफली का from the डिज़्नी XD show, "Pickle and Peanut" are the most annoying characters डिज़्नी has ever created, if Walt डिज़्नी was still alive, I think he would be horrified if he saw this show.