Grades are based on buying recommended items (nice rito)

So lately , I tried building items that they are not usually built on the champions I play but I still succeed in the game better than trying the items that the game recommend me to buy. I get scores like 18/7 or 24/9 a lot of cs and map warding and so on and I get grades such as A or A+ even if I am the best player in the entire match, and once I played really shitty with recommended items and I got S- ... I've thought build doesn't matter as long as you are doing good. Can someone confirms me it's because of the items that I buy or am I really not that good to get at least S- ????{{champion:32}}
Report as:
Offensive Spam Harassment Incorrect Board