hardened attitude

Translations
ожесточенное отношение
Their hardened attitude made negotiations difficult.
Их ожесточенное отношение затруднило переговоры.
Definitions
A hardened attitude refers to a mindset that is resistant to change, often characterized by a lack of empathy, openness, or willingness to consider alternative perspectives. It typically results from past experiences or disappointments that have led an individual to become cynical or defensive.