TFW you win going 12/3/15 against a hard counter in lane and only get an S-

Yup, going to take a long time to get mastery 7*[zombie-brand-facepalm]*

(yes, my CS was low. Sue me for roaming a lot to shut down the enemy ADC and get my Vayne rolling so we could actually win).

Sometimes I feel like this mastery system really encourages bad play. Like if I would have just stayed in lane and CS'd instead of roamed, I'd have gotten an S instead of S-. Even though the game would have been so much harder because their Ezreal would have been 18/2 instead of 13/7 and our Vayne would have been 3/15 instead of 10/6.