I have not got a key fragment in a month...

The key fragments are never dropping as my title said. It is simply unfair! I have won about 20 rounds last month and i have not got a single one! I want to get this fixed. And by the way if we get the whole chest from an S grade why cant we get the whole key randomly? The reason is that riot wants to make too much money from people buying keys (https://www.youtube.com/watch?v=ETxmCCsMoD0) Money,money,money must be funny in the Riots world... Just skip to 00:44