5 s's no key fragment ritos please

I get i already had 4 chests this month but not getting a key fragment from 5s's is sad. i get key fragments go based off of random percentage when you win but 5's should be a full key and chest. if im going to get punished for playing at 4 am when noone is on at least let me have an increased chance at a key fragmaent per s ranks. there are just some times you play when either noone is on, or some people might just not have friends who play league. or some people like me play at weird time some times and id like to actually get key fragments w/o playing in a 5 man. RITO PLZ!