This study explores how failures in tourism services, particularly those shared online as negative destination experiences (ONDEs), affect tourists? psychological and behavioral responses. Using sensemaking theory and structural equation modeling, we evaluate the psychological responses of perceived betrayal and anger and behavioral outcomes, such as boycott intentions, desire for revenge, complaining, and forbearance, in 307 domestic tourists. The results indicate that ONDEs significantly enhance perceived betrayal and anger, intensifying negative behavioral responses, except for complaining. Robust tourist?destination relationships can mitigate these effects by mediating betrayal and anger to minimize revenge-seeking and foster forbearance. These findings offer new insights into tourists? post-consumption psychology and behaviors, highlighting the role of relationship quality in offsetting adverse tourism outcomes. This research uncovers a new mechanism for understanding tourists? emotional and behavioral responses to service failures on social media, offering valuable implications for managing online reputations and promoting resilience in the domestic tourism industry.