a person who says or writes unpleasant things about someone or criticizes their achievements, especially on the internet

Forget the haters - they're just jealous. 不要管那些只会骂人的人，他们不过是嫉妒而已。

someone who dislikes the stated thing

He thinks I'm a real man-hater. 他认为我是一个真正的厌恶男性的人。