Questione giuridica chiave
Whether the cantonal court arbitrarily assessed the evidence by finding no proven misconduct after the landlord's warning.
Decisione estratta
The evidence did not make it arbitrary to find that no relevant complaints or misconduct were established between the warning and the notice of termination.
Motivazione estratta
The new letter was inadmissible because it had not been submitted below; the medical certificate and testimony were too imprecise to prove post-warning harassment; the lawyer's later letter postdated the termination.