These are not because of coaching, this is an effort issue.
Look at his body language, look at how he is just standing straight up on so many possessions.
Same effort in Portland.
All the stats in the world don't hide glaring no effort plays, and they have been happening all season. This isn't a fatigue issue, it's happening at the beginning of games (Him getting burned in the first quarters), in the middle, and in the end. This was also an issue last year, but seems to be even worse this year.
When your leader is giving this type of effort, and displaying these mannerisms, it trickles down to the other players. Do you think the other players find LeBron motivating/inspiring when he's giving that type of effort? The reason the Raptors play hard defense, is because the best player on the team (Kawhi) gives all his effort on both ends, and is a great defender/high effort defender. And when he is out, they have Ibaka, Siakam and Lowry who are leading by example on that end.
The Lakers problems don't just stem from LeBron, but he certainly doesn't help with those no-effort plays. Dribbling down to the end of the shot clock so often doesn't do anything to help players get into a rhythm, either. Other issues I see with the Lakers is Hart deserves more time, Ingram needs the ball earlier in the shot clock to create more, and depth wise they need a backup center who can be a defensive paint presence. Tyson Chandler can still play, but he just doesn't get the reps with the Suns because of the youth movement. Him coming in off the bench to provide them with defense/rebounding and leadership could certainly help that second unit flourish more (And really the whole team all around).
The low effort defensively on close-outs and drives to the hoop is a killer. They need to play with effort, a lot of times it seems like they don't even want to be there (Including LeBron). The first thing talked about in this thread probably should have been the terrible defensive effort, not whether Walton should be fired or not. The players need to be held accountable at times, and yes LeBron as well.