Here is what i think your problem is. If you're going to become keto-adapted, so that your energy needs are met in a different way, then 21 days may not be long enough for the adjustment. Something like 4 to 6 weeks is often needed.
Om the other hand, if you merely want to reduce carbohydrate, but still keep the kind of metabolism you had before, then you need to eat more carbohydrate. From the figures you gave, your weight looks fine for your height and your body fat percentage looks right, too. So you'd be in what Mark calls the "maintenance phase" for carbohydrate consumption. That's going to mean something more like 100 grams of carbohydrate a day -- see Mark's Carbohydrate Curve:
How many carbs should I eat each day? | Mark's Daily Apple
So, where's this energy I'm suppose to have?? Where's the improved sleep?? Where's the "feeling the best they've ever felt"??
As one low-carb researcher says, you can be on the mainland or you can be on holiday in Hawaii. But you can't stop the plane half-way and land. There are "islands of safety".