> antibiotics cause mitochondrial dysfunction (particularly bacteriocidal antibiotics)

You are very assertive, but this proves that you don't know what you are talking about. Antibiotics are all "bacteriocidal".

Beside, saying the mitochondries are responsible is like saying that the arm is responsible of an incapacity to move an arm. It could be due to a neurological, muscular or squeletical root cause. Mitochondries are the factories of ATP but there are many other factors in play.

A cause could be a lack of oxygen due to nocturnal apnea, etc. Lack of vitamins, lack of iron and/or red cells, etc. etc.