i am not sure how to explain the following underlined sentences into English. Can you help me to change the senteces so that they sould more natural?
I hate the restaurant. first of all, i found out that 1)they reuse the food that customers left. Also, the owner of the restaurnt hated customers who payed by credit card. 2)He even spoke ill of the customers when they left the restauraant.
1 They reuse leftover food
2 He was rude about the customers behind their backs.