Get rid of dead wood, communicate with employees.
It's not their fault. The culture is toxic.
Transparency and communication. Stop the fake culture and admit you are in it for the money.
The culture is a lie. Be honest that you are only in business to make a profit.
Take a look at the marketplace and realize that you are profitting off underpaying your employees. As a result, you have poor performers because they are disincentivized to work.