Does the subject want to ask: "Why did the mouse fail to jump ship seven times in the food war?" The reasons why rats failed to change jobs seven times in the food war are lack of understanding of ingredients, poor skills, lack of patience and perseverance, lack of creativity and imagination, and lack of teamwork spirit.

1. Lack of knowledge about ingredients: Before he switched to be a chef, Gary might not fully understand various ingredients and how to combine them to make delicious dishes.

2. Poor skills: Cooking requires superb skills and experience, and Gary may lack enough training and practice in this respect, so he can't make authentic food.

3, no patience and perseverance: making food requires patience and perseverance, and Gary may not have the determination and perseverance to stick to it.

4. No creativity and imagination: A successful chef needs creativity and imagination, so that he can discover new tastes and creative dishes, which may not be possessed by Gary.

5. Lack of teamwork: Cooking food usually requires teamwork, and Gary may not have the ability and spirit to cooperate with other chefs.