I give you points for not completely bashing the Keto diet but I have to ask you why do you think it is hard to follow? Do you tell vegans that their diet in unsustainable? I know for myself I can go to almost any restaurant and eat a keto meal the same could not be said with vegans. A properly balanced keto diet would require no vitamins or minerals (the reason for Keto “Flu”) the same can not be said for vegans, most vegans have major deficiencies and some vitamins like B12 are near impossible to obtain without supplements.
What carbs should I avoid
Don’t be afraid of a banana. Do be afraid of going over your carbs and calories. The same person that will write a hate comment about banans not being keto will sit and eat 10 handfuls of nuts. Guess what, just because you think nuts are a “keto food” you are eating waaaaaayyyyy more calories than you need and you will not lose weight. Keto is not a miracle diet. The laws of science still apply.
I have never tried a keto diet (don’t like the idea myself) but I am what you could call moderately (or “liberal”) low carb. Around 125g max net per day, which as you likely know is half the RDA of 250g. I get most of the rest of my energy from protein and some for fat. The RDA of protein, around 50g, is only just enough to sustain muscle of a sedentary or low movement individual – and this is proven by the fact that a lot of people who hit the gym eat easily 2-3x the RDA of protein.