Final answer:
The word that fits the context of the sentence about Roger's behavior is 'aggressive'. His actions, not being positive or neutral, likely worsened his already bad relationship with his partner.
Step-by-step explanation:
Roger's aggressive behavior compounded the bad relationship he already had with his partner. The context provided suggests that the behavior being described is neither positive nor neutral, but rather harmful and likely to worsen the relationship. According to the psychological literature, such as the works mentioned ('Aggressive Cognitions and Aggressive Behavior' and others), aggression in behavior can reinforce negative cycles in interpersonal relationships, suggesting that the word that best fits the blank in the provided sentence is 'aggressive'.