I hesitated checking out Backstrom because of the bad to mixed reviews I've read about it but for Rainn Wilson sake I gave it a try. And was not disappointed.
I've seen the first three episodes and I've enjoyed all of them. I agree that the writing could be better but the cases were solid and solved in a believable way (no C.S.I-stuff). The dialogues and Backstroms monologues are quite fun and I laughed a few times during each episode. What I didn't like was that all the flaws and character traits of all the main characters were way to obvious and were introduced within the first 30min of the show.
It's not The Wire but then again hardly any crime show is but in my opinion it is right up there with Mentalist, White Collar and shows like that. No flawless depiction of police work but a fun show with an edgy main character and an outstanding cast.
In conclusion, yes the self-destructive, grumpy, jerky main character is hardly a unique idea and Backstrom sure does resemble Dr. House and yes the writing is sometimes a bit blunt and may also be factually wrong at times. If those things bother you, the show is not for you. But if you can overlook these flaws you'll have fun with Backstrom. And not to forget: Rainn Wilson!