He links seven studies showing increased mortality from keto diets here:

https://medium.com/thrive-global/the-skeleton-in-the-ketogen...

We agree that refined carbs are a bad idea but avoiding complex carbs is also a bad idea.

Plus you should at least consider that a diet high in animal products has a massively higher environmental footprint than a plant based diet. If everybody ate the way most keto proponents suggest we should then we as a planet and species would be screwed.