If you go back and look at the 2012 season, RG3 had a couple great games and some mediocre ones full of a few wow moments. And the league simply had no idea how to defend the read option. His first read was open all the time.
I'm sure he would have got better had he stayed healthy, but that's the thing with him -- even before he tore his knee, he took way too many hits and it wasn't the coaching staff's fault.
His comments after the game today were classic BTW. Dude hasn't changed. Never his fault.