hater
/ˈheɪtər/Definitions
1. noun
a person who dislikes or criticizes someone or something, often in an unfair or excessive way.
“The celebrity’s harsh critics were labeled as haters by her fans.”
2. verb
to dislike or criticize someone or something.
“She hates the new policy and has been hating on it on social media.”
3. noun
a person who is excessively negative or critical.
“The hater of the party was ruining the mood for everyone else.”