hater
//ˈheɪtər//
Noun
haterSingular
hatersPlural
1
A person who feels intense dislike or hostility toward someone or something.
He's a hater of modern art and refuses to visit galleries.
2
(slang) A person who criticizes, disparages, or expresses negativity toward someone, especially out of jealousy or resentment.
Don't let the haters bring you down; they're just jealous of your success.