Cousins is an idiot.
Idiots -- at least in terms of basketball IQ -- don't put up numbers the way that Boogie does.
What numbers? His team has a losing record.
Are you being deliberately obtuse, or are you just not reading what others have explained?
The starting lineup in particular, but lineups that include Cousins in general, are outscoring their opponents consistently. The losing record comes from the team falling apart when Cousins is on the bench.
That's without even getting into the fact that lots of great players have played on teams with losing records (Anthony Davis, Kevin Garnett, Paul Pierce, Ray Allen, etc.)