With half a chance it might have lived but it had none that dark bedroom killed it what dose this mean?

The phrase suggests that the subject had the potential for survival, but the oppressive or bleak environment represented by the "dark bedroom" ultimately led to its demise. This could symbolize feelings of despair, isolation, or neglect that stifle hope and vitality. The darkness serves as a metaphor for the circumstances or emotions that prevent life from flourishing. Overall, it highlights how a negative atmosphere can extinguish potential.