How to tell when your champ is broken.
When you play a ranked game, and the carry has 15 kills and you have 1 and you still have 5k more damage than them.
When you play a ranked game, and the carry has 15 kills and you have 1 and you still have 5k more damage than them.
Or just a control mage.
When a tank can build full crit and still tank.

(Seriously: how does that even make sense?)
Maybe you were playing with the rank 1 kill stealer KR and didn't know it
DoT champions regularly top damage charts because regen means that non-fatal damage they deal gets healed us before the fatal damage is dealt.