Well, if you want to compare another ADC to Kalista, compare Twitch. Her spears function a lot like Twitch's contaminate, just so you're aware. Also, Graves is not that bad. Most of the time, Graves is really easy to beat if you take him out before anyone else. That's the point of positioning and focusing people in teamfights. If he survives, his passive makes him pretty hard to kill, in which case you have a problem on your hands.
I'm honestly not sure what this post is about, as you seem to say he's good but then he dies. Are you saying that your Graves doesn't know what he's doing, which implies he's bad. But you make him sound so op by comparing to Kalista and saying that he goes '100-0.'