have you heard of a thing called amylase?  it's a digestive enzyme that's in your saliva and starts breaking down carbs in your mouth.  If you are having an issue with carbs that's more than likely a problem with your digestive system not the carbs.  Now everyone is unique but humans are omnivores and carbs are no issue when you are healthy.  That means real food carbs not crap they profit off of and the majority of the plebs consider as carbs.

A low/no carb diet does not work well for the majority of people.  In the short term you see benefits more than likely because where you came from was a lot of processed foods but in the long term thyroid, mitochondria, hormones, energy, etc. will be impacted.