“Backstabbed” (** out of four) was an obvious, predictable melodrama about a struggling wife (Brittany Underwood) who decides to become a real estate agent and begins working for a corrupt broker (Josie Davis) who is ruthless and vindictive and will do anything to land a deal. Davis’ amusing and campy performance makes this almost worth watching for a little while but she is backstabbed by a routine script without many surprises. Not all that different from last year’s “99 Homes” which told its story with much more complexity and emotional charge.