Restraunts are high turnover businesses, as in most new owners don't make it more than 2 years. Many small businesses are owned by people without much knowledge or experience outside of that business. Very little classical education/degrees. The only businesses that thrive become survivor bias, they believe what worked before is what will work now, not realizing that markets do change.

I can perfectly see a dysfunctional small company draining their business away by just not changing. Happens all the time on Kitchen Nightmares.