KDA is not the entire part of your self worth as a player.
No recent games have really triggered me to make this post.
Just because you do really well in a few games and demonstrate the ability to go 20/0/25 (or something) doesnt mean you are a team player. Why does it matter if you can do good with a champion if all you can do is support yourself instead of the team? Where is your ability to nuke one person go when they are taking our nexus?
What about supports? You may think their KDA is garbage but in reality they are part of the reason your ADC and jungler is fed. And who cares if, lets say, master yi is 0'4, he took 4 turrets split pushing and got the dragon.
If you are unable to help your team with anything you shouldnt bitch about what rank you are in.