kamikaze shitposter

Someone in a social media group having a complete mental breakdown that posts comments lashing out at named and unnamed individuals (shitposts) drawing the ire of the group who then pile on the abuse drowning the shitposter until they quit or get banned

Karen was so upset someone fact-checked her meme she lashed out at everyone with a string of nonsensical tirades exposing herself as a kamikaze shitposter