Do you have proof that he had overcome? May be he is still using hammer and Knife on his family members.
Have you seen his closing eyes ritual while speaking?
That blinking thing. Curiously, it’s hardly mentioned on google/youtube/bing. Strange.
I have no proof that he has overcome his pathological temper... But, if I had to bet, my money would be that he has or else we would have heard something about it..