Food quality in restaurant worsens due to lack of customers

In panaji, one restaurant was offering fairly good quality food to customers including sweet dish till October 2019 for its rice plate for Rs 100
In december , the domain investor went for a meal to the restaurant again and found that the food quality had declined to a great extent
No sweet was being served at the restaurant, and the quality of the rice had also worsened.
Though the restaurant has a good ambience compared to others, it has very few customers
This could be the reason for the decline in food quality