hater
n. countablen. someone who dislikes or criticizes a person or thing, often because they are jealous. You use this for people who find something negative to say even when things are going well.
n. a person who habitually expresses negative opinions or criticism, often motivated by envy or a desire to diminish another's success. Frequently used in digital and social media contexts to dismiss detractors.
Don't listen to him; he is just a hater.
She posted a video telling her haters that their negative comments only make her work harder.
In the era of viral fame, public figures often categorize all legitimate criticism as the noise of a hater to avoid engaging with valid concerns about their conduct.
From Middle English hatere, equivalent to hate + -er. Compare Old English hetend, hettend (“enemy”, literally “hater”). Cognate with Dutch hater (“hater”), German Hasser, Hässer (“hater”), Danish hader (“hater”), Swedish hatare (“hater”), Icelandic hatari (“hater”).
Commonly used in the plural form; often appears in the phrase 'haters gonna hate'.