Guiltfluencer

Guiltfluencer gilt-floo-en-ser
noun

A crafty individual who skillfully uses guilt as their main tool to manipulate others' perceptions, often casting a negative spin on subjects to dissuade or gatekeep people from engaging with them. This persuasion maestro operates by triggering feelings of guilt, regret, or responsibility in their audience, effectively influencing opinions and decisions.

Ever since Karen became a vegan, she's turned into a real guiltfluencer, making everyone feel bad about their food choices."