Hating comics because you don't like Frank Miller sounds like a huge overreaction. If you don't like Frank Miller, just stop reading his comics. Or, better yet, roll your eyes at some elements of his work, admire others, learn what you can from them, and form the nuanced opinions we need in our complicated world.
There are people who "hate" for a living, like the pundits you can see on cable news shows. I am not saying she is one - I know next to nothing about her - just that these people generally exist, and your assumption that she must not hate comics might be a little flawed.