Green is absolutely a score within the offense guy. That's why he's struggling so much, because the offense isn't being run, and he hasn't even been given the correct role. Anytime you give Green the ball and tell him to play outside of the offense is when you see massive mistakes.
Green is good at running of screens for spot up jumps, getting in position for postups with nice fadeaway jumpers, and cuts for nice finishes at the rim. Ask him to create and his head will explode.