Start filtering people for the positions better, utilise your HR, not your managers.
I can hardly think of anything positive it is just so toxic that every day becomes a survival.
A lot going wrong, starting from choosing the right people like bosses and managers, not bullies who get away with a lot.
No real reward for overworking during COVID, while still required to meet KPI's. Often felt unaccepted by my own peer group and ignored by my own boss.
Maybe start with treating people the way they want to be treated. Stop playing favourites and start placing people in management who actually have the skill to be a manager.
Coworkers need to stop bullying each other, start respecting each other and be willing to help each other. Start celebrating each other's success not tare the person down or worse completely ignoring the good work they are doing.