antagonizers

Antagonizers are people or things that provoke hostility, irritation, or opposition in others.

The term emphasizes the active, often deliberate nature of the provocation—an antagonizer doesn't just happen to annoy but seems intent on stirring up conflict.

The comment section was full of antagonizers looking for a fight.

In scientific contexts, antagonizers may refer to substances that block or counteract biological processes, though antagonists is more common in that usage.