To my mind, there is a big difference between saying that you find someone's personality trait(s) irritating or annoying, and saying that you hate that person.
It annoys or even upsets me when people say they can't abide someone for no good reason - I always want to jump to the defence of the disliked person- yet I could add a few names to the list myself, and really hate the shouty presenting and hysterical screechy laughter that many so-called celebrities do now. I also hate the fake faces that many must have spent a fortune on - to me, the artificial look is awful, and I can't help forming a negative opinion of them based on that alone!
That makes me a complete hypocrite, and I'm trying to work out why I feel like that.
Maybe a large part of it comes from my own insecurity and remembering how much it hurt me as a child to be shunned by people who didn't know me at all. Amongst other things, I remember a comment about the way I laughed, which certainly explains why I feel very defensive towards Elaine Paige.