I've played this game from start to finish and was astonished at the unoriginality of it. The "bullet" time was copped off of Max Payne, and the rest of the game was copped off of the GTA series. It is supposed to take place on the "streets" of LA, yet in one level you are fighting off zombies and throwing them into fires, thats something that doesn't usually happen on the streets.
The fighting part was ok at first, but got dull and boring as time went on. Stopping street fights or riots was a new twist but got so repetitive I just had to play straight through with no side objectives. I give this game a 5/10.
And to answer your question, It got a bad rap for copping aspects of other games and being way too repetitive.