All 3 of those guys owned their teams for decades and could never produce consistently winning programs, despite having tons of high draft picks and playing in massive media markets. Sterling ran the LA Clippers, Dolan runs the New York Knicks, and Johnson runs the New York Jets. All 3….face plant, after face plant, after face plant.
Donald Sterling was literally a slum lord, racist, and a serial adulterer, so in addition to being a crappy owner, he was also a crappy person. When irrefutable evidence of his racism broke, the NBA was more than happy to seize that window of opportunity to force him out of the league.