Simple: Fire them.
Don't Treat Me Bad was created in 1991.
Why You Treat Me So Bad was created in 1986.
Bad very bad
Bad, but if they are nice, they treat it nicely (but they won't).
Tell management that they're bad
when he does not treat you right
they are cowards and they need the coverage of other people to show their bad side.
Bad.
bad
Bad
bad
really really bad