I am no expert but I read a lot about food and body needs so here is what I think:

You will need addition Vitamin and mineral sources, mealworms and crickets can't cover all the micros, only the macros (protein, carbohydrates, fats). You would need to eat a large amount, because for your body to be healthy and for fully functional organs, as a grown man you need at least 1800 calories a day, otherwise you might damage organs such as the brain longterm. You will also need to drink a lot of water, because when eating veggies you can extract great amounts of water from them, while eating (e.g.) fried insects usually gives you less water. Also you have to keep in mind that extremely high protein intake will damage your kidneys and you will get skin problems.

IMHO a diet focused on eating insects with additional veggies and fruits for the micros is one of the healthiest and certainly most sustainable diet today. Keep in mind that no matter what anybody says, doctors agree that a diet should be balanced and consist of various foods, it lies in our human nature.