Officer Roko is inept. She has screwed up in ways that could easily have cost lives (mostly her own), mostly by failing to consider tactics, exit strategies, cover, and backup. Rushing in past CW as she has here, for example, sets up CW to shoot her in the back of the head if so inclined and armed. It's the sort of move that works if and only if you have a partner covering things from the door. But if she has a partner, the partner is staying home here.
I still have a soft spot for Roko, because she's got courage (even if it's stupid courage) and she's clearly one of those who isn't on the take.
These 'open secret' kind of establishments - brothels, illegal fight rings, etc, where the customers have to know where to find it and therefore the cops know too but they never seem to get shut down - IMO can only exist because the operators have identified the right person to bribe or blackmail and the right thing to bribe or blackmail them with. This could be the police chief who can deploy officers elsewhere, or a judge who can refuse to issue warrants, or a DA who can decline to prosecute, or a judge who can refuse to convict, or even the actual could-have-been arresting officers (although that last is rare because it's so unreliable).
Roko's repeated failure to call for backup means, to me, that the police are actively being directed elsewhere. She's on her own here. I mean, it could also be explained by unbelievable stupidity, but if she were that stupid she'd have trouble getting dressed in the morning. She's the only one here because she's the only one who isn't giving up on the 'untouchable' establishment someone dirty is taking bribes to protect.
She might be glory-hounding, she might be inept, she might be inexperienced, but she might just be one of the only honest police officers the town has got.