It seems like you're not reading/listening to what people are telling you.
The "actual" rate of charge is measured in kW. Not "miles per hour." Just like the amount of gas you put in an ICE car is measured in gallons, not miles, and (if you cared) the rate of filling up that car could be measured in gallons/second or gallons/minute, not "miles per minute". You're not putting miles in the car, you're putting energy into the car. As others have tried to say, about 6+ times now, "miles per hour" is just a ballpark/colloquial way of expressing a charging rate in a way that's easy for people to have some understanding of, but it's not a true unit of measurement for power delivery and thus is irrelevant to use in the way in which you're trying to use it.
Aside from what you might call the "normal efficiency rating" of a car/battery system in terms of range, there's also driving style/habits. The same amount of power delivered to the car will translate into different range when its consumed depending on a variety of factors — including how you drive it. Just like gas/ICE cars. You getting mad about this charging rate when you're looking at it in "miles per hour" is like getting mad at an ICE car's range estimate after you fill the tank, when you drive it like a bat out of hell and only get 60% of the estimated distance.
