First I would investigate what they are saying and why. If you ask why 5 times, you get at the root cause of the problem. Usually the problem is a disgruntled employee, lack of communication, or a problem that I would not be aware of that was serious. (This happens a lot.)
Next, I would look at my hiring criteria. Did I hire people because they were willing to work cheaply? Because they would do what I asked without questioning? Perhaps I made bad hires for the wrong reason.
Secondly, do I have family members in key positions who are not pulling their weight, or are using their family position as an excuse to slack off? Is a family member stealing from business? Leveraging their position over employees?
Working in small businesses, people are generally unhappy when the owner is a poor communicator, or has a patriarchal way of running the business (“my way or the highway”) and are often obstinate about improvements or the importance of problems. Sometimes problems are averted when an owner says “I want you to do it this way because___ (valid reason, not “because I own the business and I said so.”) That gives the employee an opening to say, “there’s this software that will enable us track inventory/improve billing/whatever”.
Sometimes people really do need to be fired. They don’t want to work.
I once worked for a company where a former manager had the keys, and was coming in at night to use computers and copier equipment. He would scare the girl who stayed to do the billing. She assumed because he was coming in, the owner said it was okay, so she complained to the other people that worked there, about how creepy the guy was to her. Finally, someone went to the owner and got mad at him, and said why are you letting this guy come in after hours? The owner had no idea, and within an hour, every single door lock on the building was changed, and keys issued only to certain people. It turnes out there were people who had bootleg keys to the building, and were stealing stuff.
It was a good lesson in management can’t fix problems they aren’t aware of existing.