For social interaction on streaming platforms, chat feedback is a primary means for real-time engagement and expression of opinions. Given that social media is prone to stress by promoting social comparison, this study investigated how the valence and evaluation type of chat feedback influences streamers’ emotions, attention, and performance. In an online game-streaming context, participants engaged in a shooting game while receiving real-time chat feedback of different valence (negative, positive) and evaluation types (comparative, general). The results revealed that receiving negative feedback led to experiencing higher anxiety and lower self-efficacy and social support. Furthermore, comparative feedback negatively affected game performance and attracted more attention to the feedback. Interestingly, the tendency of comparative feedback to capture more attention was stronger when the valence was negative. These findings contribute to understanding the influence of social feedback on emotions and behavior and provide valuable insights for improving the user experience and performance.