I am no dietician or doctor. However, I can say that you didn't try the diet long enough to conclude if it had any beneficial effect for you. Also, given that you were not aware about the possibility of keto-flu, I suppose you also didn't gather enough information about it before going on such a diet. I strongly recommend that you learn more about the diet before you try it again (if you do choose to do so). It is easy to fall into a pattern where you fail to get all your micronutrients on such a diet.

When I tried such a diet, it had a very positive effect on me and I will eventually go back to it.