The point of the SCRUM Sprint Retrospective meeting is to look at both positive and negative aspects of the project. If the meeting is facilitated by the SCRUM master in a way that the team members only discuss “what is not working”, and the meeting is focused on negative issues, it might damage the work atmosphere and have a negative impact on the team.
A negative and disengaging atmosphere might lead to difficult conversations and poor performance of the team members.
A professionally facilitated Sprint Retrospective meeting where there is mostly discussed “what is working” is a good starting position to continue with the team development. It is a great opportunity to build team confidence, trust, recognition, self-organizing and gain a focus on the next sprint. Remember that a fractured team is like a broken leg and fixing it is a painful process. Try to avoid leading your Retrospective meeting in a way which might damage and/or disengage your team.