If you are replying with “isn’t this the guy” it means you didn’t bother to read the post, which also removes the merits of you questioning if what he is claiming is fiction or not.
But people on HN provided context and it indeed seem he was stalked and harassed, but through his VTuber persona and there was even a GDocs document with the details.
Edit: His VTuber persona is Asahi Lina
Sima (Simona Vetter) quotes “Being toxic on the right side of an argument is still toxic, […]” while being toxic