Jalen is adjusting to playing in a real basketball system under Hurley and also having a PG next to him in AG.
Under KO in years past, he had to carry the load of ball-handling and creating offense out of necessity. Also, a majority of his time in that role, the team was losing frequently and needed him to push the ball offensively and play a bit reckless and force things. He was, out of necessity, always in attack mode... and KO did nothing to reel him in.
Under Hurley, and now with a healthy PG and in a better team system with more talent around him, it's a totally different scenario for Jalen. He needs to learn how to play within a structured offense and realize that each possession is valuable. He still hasn't been able to adjust to this role and know when to be assertive within the flow of the offense.
His role on this team should be penetration and kick out, mid range pull up j, or attack the rim. That's what he does well and he's trying to assert himself from 3 when that's simply not his strength and he has a decent team around him now with better options.
Also, he's never been a natural leader and almost faces that expectation of being a leader which makes him force things more.
While he's gifted offensively, he still is uncomfortable in this offense and doesn't know when to assert himself.