Or probably Jason Kidd is part of the problem? it seems that he can't bring the team into chemistry, just like in this game, they have a good chance to win although I have the underdog Atlanta to beat them.
And that has been the story of the Dallas, the bench is not helping, or at least if they, it's always feel short of expectations.
There is always some missing pieces and it's hard to pinpoint whether it was the coaching of the players themselves.
I highly doubt Jason Kidd is the problem.
Luka can make kick-out plays and all he needs is someone to shoot it perfectly given the space provided by his attack to the paint. He can absorb 2-3 defenders and that means someone will be open, but when they shoot, it's always brick or they hesitate.
Then, there's the problem on the defensive end of the floor. Luka cannot do both if he is using most of his energy on the offensive end, he needs someone to fill what is lacking from him. Just like a Draymond of Steph.
Either way, Doncic is the one who has a big impact of the team and the role players are performing better now compare to how they performed at the start of the season but if they want to be a playoff contender, they might tweak the roster a bit and get some better role players
I like to think what Doncic did was shake these players on their roster. Boost them up to avoid being traded. Play harder. Be consistent. Because if they do all of those, I doubt he will request something like this again. Who knows, they might just need a little push.