Ask HN: Google Play allows to call female founders “useless woman”

Hi everyone! Last week I’ve got the personal hater, who wrote me couple messages via social network from the fake account and started to blame me. I tried to answer politely, but he(she) can’t calm and promised to write about me bad reviews everywhere. Next step was 1-star review on Google Play. OK, maybe he(she) doesn’t like my app, but review started with the statement, that I’m “useless woman”. Other review statements were about our conversation in another social network but not in my app. I connected Play Market support via Developer Console, but they refused to delete it. Is that normal nowadays to allow personal humiliation of dignity in reviews of the app? What else can I do to protect myself?