The post-pandemic disruption of the global supply chain has caused severe stresses and conflicts in business-to-business dyadic relationships. Furthermore, intentions to dissolve extant relationships, motivated by opportunism, or actual terminations have aggravated the situation. Drawing on the dark side literature, we investigate the precise nature of the stress-inducing antecedents, the types of manifested conflicts and their outcomes on B2B dyadic exchanges. Using a proprietary survey data set of 487 dyadic conflicts collected from conciliation-arbitration cum legal experts in an emerging market, we provide insights into how tolerable and intolerable dark sides adversely affect short-term transactional and long-term relational B2B dyads, respectively. More importantly, we provide deep insights into specific and critical governance mechanisms invoked to attenuate/accentuate the respective dark side effects on B2B dyads. We contribute by providing an end-to-end spectrum of dark sides and their governance mechanism in B2B dyadic exchanges.