The opening cutscene shows our protagonist in the shower, with a visible butt, no genitalia is shown. In the cruise ship level, some NPCs seem to be naked, I don't think they have nipples or genitalia, hard to tell with this game's artstyle.
It's low poly but there is gore, headshots decapitate, and powerful weapons (or enough hits to the body) can cause npcs and enemies to explode in chunks, organs from gibbed enemies can also be sold on the black market, there is an option to change the blood color in the options menu.
Cops are depicted as a literal cult, and the head took everything from the seized narcotics and turned into a bouncy castle. So no, cops are not depicted in a sympathetic light.
Definitely don't play this game if you're sensitive to visual stimuli. The visuals are designed to be abrasive and headache-inducing even for people who aren't!