last season, he was 16th in the league in shots attempted with 52% efficiency on 2pt percentage. an efficiency that is at par with donovan mitchell, jason tatum, d'aaron fox and bradley beal, all of them attempting more shots than him. this season, he is way down on the list at 13 shots per game on 48.6% efficiency on 2pt percentage, all the while adjusting to a new role and offensive scheme.
i don't think you can just accuse him of being inefficient. his usage rate is high, but his shot attempts isn't that high.