Its as simple as that.
They try hard, but there is no belief and no confidence with the ball.
This is a coaching thing,
The coaching staff should be providing the technical side of attack.
I watch and yell at the TV, "somebody just bloody do something!!!" They stand flat in attack, and looked stunned when the ball is passed to them. No-one has any idea what to do, so they run one out in slow motion, get up in slow motion, and think about who to pass to while the opposition rushes up and shuts down play.
Nobody can read what's in front of them, they just do training runs, then kick on the fifth.
No urgency, no running onto the ball, no speed in attack - just slow motion, predictable plays.