Where did you that he was in therapy from early childhood? From what I can determine, he never once went to therapy, at least until the time he was 20.
http://www.telegraph.co.uk/news/worldnews/northamerica/usa/10857021/Elliot-Rodger-may-have-used-machetes-and-hammer-to-murder-house-mates-in-killing-chamber.html
In therapy since age 8,