I'm completely bewildered by this.
Throw the ball inside and hit your guy with it when he's spotting up...pull-up or hit him with a pass in transition...call for a pick...use off-ball control and run your guy through other people.
The most effective way to get by your man in isolation is to catch the ball in triple threat...lean out with the freestyle stick then take-off with the left analog stick. When you get by your guy you can pull up.
I have a guy in my franchise who has hit 11 threes in a game and he has 55 speed...I don't find it difficult at all to get a shot off.

