Magic Johnson was horrible his whole career from downtown. So was Penny Hardaway.
Assistant head coach Alex English is one of the most prolific scorers the league has ever seen and he shot a career 21% from downtown.
Dominique Wilkins was horrible from long range as well.
As Tim mentioned, Michael Jordan was like a 15% shooter from downtown during his first four or five seasons.
Dwayne Wade is horrible from long range.
To DeMar's credit, he doesn't take many attempts. Like one every two games. He doesn't need it right now.