No, do not "go away."
Do not tell people to go away just because you think their fic is not up to snuff, regardless of whether or not they seem to be ignoring your advice for improvement.
Seeing as he has already replied to good criticism with quitter's words...
I might have to leave this place.
I figured it would be best if he followed through with SOMETHING. It's very upsetting to see good advice go ignored constantly.