Speaking ONLY from personal experience;
I read this on a former aggregation site that has since shut down and shall not be named. I remember rating it poorly on said site because (as far as I remember) the author seemed me to take great efforts to make the mc seem like a cunt. And succeeding.
Because of this, I didn't get very far into it, so I can't comment on whether it contains the forbidden three letters or any other reasons it may have a low rating - just that on a different site, how the mc was written was enough to put ME off continuing and rate it down.
Whether others may have done so here, I leave to your speculation. Just saw a lot of "why rating low?" comments and thought to chime in.