> Stop eating carbs, namely because it makes you sleepy and unmotivated. I replaced carbs with tons of fiber and vegetables, like red cabbage, matchstick carrots, and expensive fermented foods.

There's nothing with carbs, just that you may have been eating too many to begin with. Many many vegetables contain carbs. People shouldn't stop eating carbs, but should reflect on their intake and adjust such that they're not consuming too many, particularly simple carbs as its so easy to do.