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 প্রণয় to hate. Sarousch was a hell of a lot আরো likeable and was funny too.
If ডিজনি Channel, ডিজনি XD, অথবা ডিজনি Junior characters count, then, I say জরান and চিনাবাদাম from the ডিজনি XD show, "Pickle and Peanut" are the most annoying characters ডিজনি has ever created, if Walt ডিজনি was still alive, I think he would be horrified if he saw this show.