In no other field do supervisors have so much power to destroy careers and with no accountability for their actions. They are totally protected by school districts and thus taxpayers when these incompetents and cretins screw up, which is often.
From the original study:
As the conceptual framework and the findings from this study suggest, how novice teachers perceive the attitudes, beliefs, and behaviors of their administrators can have important implications for their planned career decisions. Specifically, when novices reported administrator-teacher relations in their school as being poor, they were significantly less likely to indicate intent to remain teaching in that school. Poor relations between the administrators and teachers can be reflected in the level of agreement between administrators and teachers regarding school/district policies, evaluations of teachers' work, the willingness of teachers to work beyond contractual requirements, or even in ongoing quiet discussion among teachers regarding their treatment and school/district policies. In particular, perceived conflictual administrator-teacher relations can create a challenging and to some degree threatening workplace for these teachers (Belman, 1992). As the conceptual framework suggests, it is the perceptions regarding the relationships between the administrators and teachers that are important.
Novice teachers may be particularly sensitive to school-wide administrator-teacher relations within their schools. For example, competition between teachers and administrators for the loyalty of novice teachers can create strain on these novices, especially in a school marked by poor administrator-teacher relations. On the one hand, novice teachers often have a sense of loyalty to their administrators because they likely had a direct role in hiring them. Also, due to lack of job protections (i.e., tenure), novice teachers may be reluctant to openly oppose their administrators' decisions. Conversely, in a school marked by conflictual administrator-teacher relations, novices who are seen as too friendly with the administration may be socially and professionally isolated by their teacher colleagues. Although most conflict is not so extreme, given the position of novice teachers and the effects of conflict on them, their sensitivity to the administrative climate is not surprising (Belman, 1992). Ultimately, novices may feel they are caught in the middle of conflict between the administration and certain teachers, which then influences their intended career decisions.
Much more at the link.