Bruh not everyone have a same taste like you. I personally liked the black coffee, with or without milk.In case somebody doesn't already know, trying to cut the bitterness of coffee using just sugar is like trying to put out a forest fire with a squirt gun.
You need to add milk, instead. (Actually, you need an entirely different beverage. Coffee is disgusting no matter what you do to it, but the milk at least renders it potable.)
The black coffee without sugar and milk was excellent for me in times of traveling. It helps to clear the fatigue and although it is indeed bitter, the aftertaste was good.