Not a good diet at all. There are a few issues here I see. First is your number of termites is a few orders of magnitude too small to be a significant source of anything. If you increase it as pojo-huy suggests, it would round your diet out a bit, but that still doesn't make it a great answer. This is because zoos don't just feed their animals what people eat, they try to make specialized feeds with 3 general goals in mind:
- Keep their animals healthy.
- Maximize their limited budget.
- Simplify care through minimal prep work.
Warmer Climate: Wheat and Beans
The ideal solution to answer all 3 of these concerns was already figured out by humans 1000s of years ago back when agriculture struggled to make enough food to survive. The ideal cereal grain for a limited diet is wheat. Wheat has more vitamin-C and Omega-3 than other cereal grains meaning you don't need to supplement it with fruit and meat to reach your dietary needs. Which bean you pick matters a bit less. Most of them will fill in what wheat is lacking in. A common misconception about wheat is that it is mostly empty calories, but that is not true. Modern milling practices make flour mostly empty calories because they extract all the good nutrients from the flour to keep it from spoiling. But whole, unprocessed wheat is practically a balanced diet all on its own. Just boil it whole, or mill it when you are ready to cook with it, and you get its full value.
Another nice thing about wheat and beans is that they grow very well when planted in rotation. While wheat and beans may be a bit less calorie dense and a bit more labor intensive to process than some other crops, they have very low failure rates and store very well, and this lack of attrition makes them the cheapest option. At current bulk rates, you can feed a human for just $0.52 per day plus the labor of meal preparation. So with Wheat and beans, you can keep your humans healthy with minimal cost and complexity.
Colder Climates: Potatoes & Eggs
If you live in a colder climate, the failure rate of beans and wheat goes up significantly taking away thier biggest advantage of being reliable crops. In such colder regions, the ideal solution is potatoes & eggs.
Potatoes have nearly all of the nutrients we need for survival and they have the highest caloric return for the amount of farmland used out of any known plant. They are much more vulnerable than wheat to warm weather based crop and storage failures, but as long as you live somewhere cooler, they can produce an even better return on your amount of land and labor than wheat and beans.
Potatoes also lack some of the vitamin D & A you get from a bean/wheat diet, and dietary vitamin D becomes extra important in colder climates where your body produces less of it from the sun. Eggs come in as a cheap way to supplement what potatoes lack. They are really easy to cultivate compared to other animal products, and they contain the important vitamin D & A that potatoes are lacking in.
Just eating potatoes and eggs will keep you alive and healthy for a pretty long time. But, there is a catch. Neither are a good source of calcium... or are they? Eggshells are the basis for most calcium supplements. So to prevent calcium deficiency, all you need to do is grind the egg shells into your feed and you have a complete diet.
The cost of feeding chickens and shorter shelf lives of eggs makes this more expensive than the wheat and bean diet at about $1.50/day, but if you live where there is less sunlight, the cost of locally sourced food being higher is just a given.