<![CDATA[Toxic leadership has emerged as a pervasive threat to employee well-being and organizational sustainability in modern hyper-competitive environments. This critical review systematically synthesizes 16 benchmark empirical and conceptual studies published between 2021 and 2026 to evaluate the multidimensional impacts of toxic leadership behavior—encompassing abusive supervision, authoritarian control, narcissistic exploitation, and unpredictable bullying—on employee burnout dimensions (emotional exhaustion, depersonalization, and reduced personal accomplishment). Adhering to PRISMA 2020 systematic review guidelines, the findings establish that toxic supervisory practices operate as severe workplace stressors that deplete employees' cognitive and psychological capital. Key mediating mechanisms include the erosion of psychological safety, role overload, and perceived organizational injustice, while organizational climate, peer solidarity networks, and proactive HR support act as critical boundary moderators. A multi-level structural mitigation framework is formulated, articulating actionable HR governance strategies, leadership development interventions, and individual resilience programs. This review provides strategic guidance for HR executives, scholars, and policymakers seeking to dismantle toxic managerial structures and foster psychologically safe, sustainable work environments.]]>
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