I was trying to find JJ saying this but I found nothing.
For me, MaRey Sue completely nullified Kylo Ren as a villian. I can`t take him seriously anymore - VIII will have to rebuild his image completely. I will not be shocked if Kylo will beat Luke and then Rey ''get out of my way Sith-CIS-shits'' easily overpowers Kylo, yet again. Such a wasted Adam Driver casting.
I find it impossible to buy that someone like him could`ve lost to Rey.
Besides, he was indeed injured and he was already capable of toying with Finn, spinning mid-air and then beating Rey with huge, sweeping strikes.
And the ''she used the Force'' excuse seems to be a rather poor attempt to rationalize it - it implies that Kylo Ren did not ''have the Force''... nevermind that two minutes earlier he tossed her 30ft in to the air.
Vagichlorians are powerful, so it seems.