I used to watch yay make insane plays back in OpTic and sometimes even before in Andbox. You could tell that he felt extremely comfortable with his role and his teammates, he had built a chemistry with them that he probably won't have with any other team. Now he's entering a new region, with new teammates and with probably little chemistry built up until now and yes, he's doing terrible, but at least we can all recognize that there's still potential in him as a star player. Let's not forget that the C9 drama, DSG and everything else probably took a toll on his mental and put a lot of pressure on him to perform. He'll eventually grow back his confidence and build more chemistry with the team, enabling him to do as good as he used to be.
This is like a losing queue in dogshit ranked: there's good streaks and bad streaks, sometimes you'll do great, sometimes horrible, but it's all about holding on through these difficult times and becoming a better player over time.