not try to; not make an effort to~
Expresses that someone shows no sign of trying or making an effort to do something.
This pattern describes a person who refuses or neglects to attempt an action. It often carries a critical or frustrated tone, highlighting the lack of effort. The subject is usually a third person, but can be the speaker when self-critical. It is used in both speech and writing, though in conversation it may sound a bit emphatic. The negative form ようとしない focuses on the attitude, not just the fact of not doing it. It is related to ようとする (to try to), but with ない it means 'does not even try'.