Being better than 5% off all other players around your MMR that play the same champion in the same role.
That's how you get an S.
That could be the case
That is the case.
In the second game, you had double the cs.
But the first one was half the time and i got a penta
That means that someone else did similar but was better in some other region, likely CD or warding
That makes sense i wasnt warding much since it was playing with my low elo friend and they werent trying to gank, thanks for the help.