I met someone like this through National Novel Writing Month events in my area. She would hit 50k halfway through the month. Anyway, we were both part of a social group that tried to get together during the rest of the year for editing and critiquing each other's work. It was only then that I realized what dreck she was churning out. It was painful. Not only was she a terrible writer, but she refused to accept that her work was anything other than a perfectly polished jewel.