Brad needs to make the players accountable when they abandon his system. His system is beautiful and effective when implemented. He had this same problem in 18/19, in fact Terry Rozier of all people remarked how they would practice their sets beautifully but the moment the game kicked in they abandoned it. That is precisely what is happening here.
For example, in the 2nd quarter of the Dallas game, Tatum dribbling the entire 24 seconds without passing once, and hoisting up a poor shot at the end of the shot clock? Brad should have either called time out, or pulled Tatum out. It was such a selfish, disrespectful, demoralizing play.
Raja Bell recently lamented (on Simmons podcast) how young players are more focused on their skill development with personal hoop coaches, which produces a lot of one on one skill set, but stalls the development of team play. Tatum is exhibit a of this problem. He has been training with Drew Hanlen from a very early age, and has developed impressive skills for shot creation, but his ability to play make, or just plain integrate within a team oriented concept, especially as a lead cog, just is not developed.
I go back to our greatest need right now, which is a player who can be a coach on the floor. A Rondo or Chris Paul type, who personally can direct and implement the offense. I thought Smart when he returned would be the guy to step into that role, but he too has come short. But even if he did, it takes the WHOLE TEAM, especially the LEADERS, to buy in.