Yes, but when you look at the rankings of the main WoW villains, Deathwing generally ranks at the end or near the end (probably the latter, after the Jailer's introduction).
Looks like people don't like the big dumb dragon threat. It is therefore not a surprise that the community prefers villains like Azshara, Denathrius, and Lei-Shen, who frankly are the exact opposite of Deathwing and Galakrond.
So what the Jailer was supposed to be, and that worked how so well right
The Jailer
theoretically was supposed to be a major force of nature, the personification of Death, like the Night King from Game of Thrones. But he was also supposed to be charismatic, because he deceived Sylvanas and a lot of other people to serve him.
But now the Jailer is considered to be the worst villain in all of WoW ¯\_(ツ)_/¯