A lot of typical drama and slice of life anime aren't always the greatest, but most people who say that they hate all anime don't have a great understanding of what anime even really is, and I believe there's anime that anyone can enjoy, you just sometimes have to sift through the dirt to find it the right ones.
Anyone has the right to dislike or even hate certain shows, but to say that you hate all animated shows or movies from a certain region of the world just doesn't make much sense to me.