New coach Jason Kidd and the Mavericks are 27 games into an effort to clear three seasons worth of dysfunction, disillusionment and blowups that cracked the foundation of a franchise built around a superstar who has yet to win a playoff series. “It wasn’t really about how Rick treated Luka,” a Mavs player on the 2018-19 team said. “Luka hated how Rick treated other people.”