I don’t even know what to say about this. This is legit “causes a mental break” internet bullying. And the 2nd time in as many months that someone I was talking to normally, for a not insignificant time, suddenly and without provocation flipped on me. Literally this exchange is
boy offers number
girl makes self-deprecating/self-critical comment
boy ridicules girl for being on same dating site as him and calls her fat and worthless
…