Hi. Physicist here. You are absolutely wrong. The mass of an object does not affect the magnitude of force of air resistance which acts upon a falling object. But the acceleration that object will have is given by Newton’s second law as Force divided by mass. So a heavy and a light ball with the same shape will experience the same air resistance, but the heavy ball will “care less” and thus fall faster.
If all things are equal except for mass. Then the object of higher mass will fall faster.