Acute mental health units are for people who are very unwell eg psychotic, manic, genuinely suicidal, clinically depressed to the point they can’t function in the community any more.
So yes there will be noise, shouting, verbal abuse from other patients, people trying to tie ligatures or being restrained because they’re refusing medication and are a danger to themselves or others without it.
They’re not convalescence, calm, therapeutic type places offering lots of 1:1 talking and therapy (unless you pay privately for such a place).
Staff generally care but they’re pressured for time and resources.
Most inpatient units have therapy groups although these activities are limited and may not be to everyone’s taste eg art, yoga, gym, walking groups, some psychological group therapy.