Question juridique clé
Whether the extraordinary termination of 18 March 2011 was justified by just cause under Art. 266g CO.
Solution extraite
The landlord could rely on Art. 266g CO because the tenant's conduct, including unjustified criminal complaints and threatening behaviour, made continuation of the lease intolerable.
Motifs extraits
Just cause under Art. 266g CO requires exceptional, unforeseeable circumstances making continuation objectively intolerable. The tenant's own fault did not bar reliance on the provision because it was not the predominant causal source of the just cause; it was instead one factor in the overall balancing.