All I've been posting about is the stressful effects of prolonged low carb dieting on the system as a whole
Zach's advice was legitimate, given that this person does not suffer from obesity and does extensive exercising. You irresponsibly mention that you do crossfit in ketosis(not mentioning at what intensity), and claim that it's entirely healthy practice to do so because you did it and felt fine.
OP clearly isn't feeling fine as they're asking how to combat carb flu.
He who dares not offend cannot be honest.