When you hard carry your adc through lane but they can't last hit so you lose anyways

Seriously, how can you fail at last hitting in the ADC role, which you were not even autofilled into? You chose ADC. You even won lane. If you want to be the ADC, the make sure you can last hit at a minimum > 200 cs in a 35+ minute game when you win lane.

There really is no excuse for the ADC to have less than 5cs/minute in a 35+ minute game unless you are getting camped by their Jungler or stomped.