However, Tywin was a person who gained some level of respect because of his calculating and cunning mind, his position as the head of the hated House Lannister guaranteed that he would always be one of the bad guys in the minds of fans, a role which was well earned.
Few characters could be described as ‘slimy’ and have it be so exceptionally fitting as Petyr Baelish, also called Littlefinger. However he put on a smooth and clever demeanor, it was obvious from the beginning that this was a man who wouldn’t allow anything to get in the way of his ambitions.
Quite possibly the most sadistic character in the whole series, Ramsay Bolton was a psychopath completely, fit for committing really awful acts with no stain on his absent conscience. It is no big surprise then that he would be considered among the most despised characters of the series.
However viewers learned in the first season that the cruel Prince Joffrey was not truly a Baratheon by any means, the illegitimate son of Cersei and Jaime did a lot to earn the hatred of fans right from the very beginning. Indeed, even his feigned charm quickly failed to cover the sadistic streak that ran beneath, which reared its head early on in the show.
Only one character could truly take the top place as the most hated character of the show; the angry and vindictive Cersei Lannister. Despised from the very start, Cersei would spend the whole series developing herself as the true villain of the show, committing many terrible acts along the way.