Can we assign a score below the ECR based on the idea that the supervisor is not setting the proper example as a leader?

The Job Achievement and/or Innovation factor is the only factor that has expected contribution criteria specifically for supervisors. It reads as follows:

For Supervisors (as appropriate): Recruits, Develops, motivates, and retains quality team members in accordance with EEO/AA and Merit System Principles. Takes timely/appropriate personnel actions, communicates mission and organizational goals; by example, creates a positive, safe, and challenging work environment; distributes work and empowers tem members.

Conduct issues can fall into “by example, creates a positive, safe, and challenging work environment; …empowers team members.”