Questions about "The Maltese Falcon" (1941)?

Well, the victims would be Thirsby, Miles Archer and Jacoby. Thirsby was a former ociate of the Fat Man, but was now working on his own to try and get the bird. Miles Archer was Sam Spade's partner who got killed when he was shadowing Thirsby. Jacoby worked on the steamer and smuggled the bird into San Francisco and he got killed as he was trying to give the bird to Ms. O'Shawnesey. They all had their own motives and even though they all died I don't think you could call any of them a victim, except maybe for Miles since he was just doing his job. Since there wasn't really anyone in the movie who was innocent, then I guess you could say that there was no one for the viewer to identify with. Same for the production values, everything is dark and there is no sunshine or happy moments or people to trust. Sam has to even keep the police at arms length, at least until he wraps the whole thing up. Everything made perfect sense in the movie. I'm not sure what people didn't understand if they think it didn't make sense.