Mastery Grades are jokes.

I create this title to say somehting annoying and strange. I have played on this game quite good. I have rly good stats on the jungle. My main is Zac. It is pretty hard (I can admit) that to get 7 lvl Mastery on this champion . I try so hard but game jokes me every time when I have had good game.

http://i.imgur.com/aryHnnn.jpg http://i.imgur.com/CypNfYi.png http://i.imgur.com/g0Bhpkz.png

Kda on my main Zac amount to around 4.51 on 80+games and i have never had S or S+ grades after when mastery becomes a reality. Before that i had many many games with those grades but now for me RIOT have sth. broken. Tell me what do you think about that.

Additionally i can tell you that man who has really avg. score get quite decent and iniquitous score. Tell me who the hell wrote that script...