Like Klaston said K/D isn't the only factor and to be honest they are all rather close to each other. Those charts are six/nine months old now so might need a bit of updating but i tried to make them as accurate as possible. They just try to show how each class really does in average during mini.
That being, if you want to prove a point, throughthedoor (or anyone), then get some proper stats. It's rather fast and simple with a spreadsheet application you fill with data after each mini while waiting for the next one.
Throwing a bunch of selected screenshots doesn't really lead anywhere and when you've reached a certain point it might be useful to continue discussing and go past the "i'm right, you're wrong" phase.