It was essentially a derivative of Wing Chun, except with less restraint, and pure focus on just taking down your enemy. Ali would have been creamed.
His other technique was talking smack, and racists comments
He was never a good person, far from being a role model. He had Frazier funding him money and making sure he could get his license back and would turn around taunting him him filthy names. Frazier hated him until his death.
JKD was all about being able to attack and defend no matter what style or technique. No wasted movement, and all about giving you the advantage. Such as, having you're stronger fist and leg closer to your opponent so there is less travel to the target. He was a fighting genius.