Also disregarding a player's negative defensive impact in one game is a terrible barometer.
Even with scoring 9 in 12 minutes, he still managed to give away more than what he returned as positive impact to the team.
This is also not 'one game'. This is a consistent situation throughout the whole season, in which he has earned himself the most negative player on the team connotation. This is with a player on your team by the name of Ed Davis who hasn't been an NBA player this year.
Quin Snyder had his head in his hands on Niang's defensive lapses. And he also got yanked.