Okay, you sorta root for the guy, and defer judgement on his corruption, but he's a Bad Detective. Not just neglecting his job, either.
When he applies himself to solving a problem, he NEVER has a plan, options, or an exit strategy. (Sound familiar?) This continually suprises him.
He's always a hair-trigger away from violence - will he blow? - no, the only violence he commits is off-stage. Nor does he ever learn from his mistakes and improve. "Victories" gained by luck are claimed; inevitable "defeats" are rationalized away. The guy's a loser, and what little care he has for his fellow man always loses out to his own short-sighted selfishness.
The writing, on the other hand, is often delightful. Clipped phrasing. Idiom-tastic. Veddy, veddy British. I have not read this author before and won't again... unless his loyal fans can convince me of a different title I might try.