Also, if the Rey/Mary Sue thing wasn't true, or atleast half true, there wouldn't be so many discussions, videos and articles about it. It's not just something that spawned out of nowhere. There must be something there if you have droves of people having to come in and rescue the critique with long, ranting blogs that attempt to contradict each and every point people have made.
If it weren't an issue, nobody would be talking about it. It would have never been brought up or be so widespread. These things don't just come out of nowhere. People saw the movie and noticed it. Plain and simple. Cover your ears and shake your head all you want, it is what it is.