noun
hater
Colloquial term for someone who habitually criticizes or expresses negativity, especially online. Similar to アンチ but often implies a more personal, emotional dislike.
See also: アンチ
SNSでヘイターに絡まれた。
I got harassed by a hater on social media.
彼は有名になるほどヘイターも増えた。
The more famous he became, the more haters he got.