If Harkless had not of secured that offensive rebound and scored, Blazers would have lost the game because of CJ's selfishness.
CJ has had a massive case of hooplock so far this season and it hasn't mattered if Dame has been on the floor or not. It wasn't as noticeable earlier in the year because CJ was shooting the ball so extraordinarily well. But as his shooting percentages have regressed towards his norms (as expected), his free-lancing and hero-ball have become a lot more visible as his efficiency has cratered. It's a really bad look for anybody but especially for somebody taking 18 shots a game
CJ is not as good as he thinks he is, nor as good as his fans believe; he's not as good a ball-handler in traffic and he's not as good an unassisted scorer. He needs to play within the offense, such as it is, and he definitely needs to share more and dribble less.