In the scenario of missing a critical deadline for a project, constructive feedback would be the most beneficial to receive from an employer. Constructive feedback provides specific insights into what went wrong, why the deadline was missed, and how to improve going forward. It helps in understanding the areas that need development, setting expectations more clearly, and identifying any support or resources that might be needed to avoid similar issues in the future.
While positive feedback is important for overall morale and acknowledgment of strengths, and continuous feedback can help maintain awareness of performance over time, constructive feedback specifically addresses the shortcomings and facilitates personal and professional growth in response to the missed deadline.