What does it mean to be a "hater"? What does it mean for a fanfic to be "good"?
For what matters right now: If I dislike everything I'm ideologically opposed to, it makes it hard to change my mind. I can read Riddle of Kyon, think it's awesome, and become a little more like Elizer, but I can't read Death of Haruhi Suzumiya and become a little less like him. It's half of the cause of an affective death spiral.
In general, I get the impression that haters are people who automatically hate something because of some specific aspect of something, regardless of what normally makes them enjoy things. For example: hating a certain TV show solely because it contains ponies, which are girly. Also, haters are people who actively go out and bash it, instead of just avoiding it, but that's not an issue right now.
I was reading a review of Trust in God, or, The Riddle of Kyon. The reviewer went through step by step and listed problems with the fic. Some of them I agreed with, and others did not. What really stood out was in a comment agreeing with it: "reading that fic usually just evoked vague anger and other unpleasantness." Not unlike the vague feeling of anger and other unpleasantness I felt upon reading the review.
I don't consider myself someone whose opinion can be trusted on the quality of the original fic. In addition to being every bit as biased as any hater, although in the opposite direction, I have Asperger's syndrome, and I don't trust myself to notice such things as people acting out of character. However, because of this, I know my revulsion cannot be due to the quality of the review. I looked for it in hopes of weakening any bias I have. I think I can safely say that my revulsion will prevent that from happening.
So, any idea on what I can do? I've always thought haters should just stay away from what they hate. That would work fine if I just hated ponies or something, but I don't think it's such a good idea in cases where ideology is involved. And if nothing else, I don't want a vague feeling of anger and unpleasantness to ruin a perfectly good fanfic, like The Death of Haruhi Suzumia.