Vayne struggles in season 6
I've put most of my adc time into playing Vayne. I found her challenging to learn but also very enjoyable for some reason. A couple patches ago i noticed that i really have a hard time winning games with her. In season 5, if i did things correctly they really paid off and i could carry my team but now i feel like even when i get fed, someone is instakilling me or sometimes the enemy adc is still stronger than me towards late game. My k/d/a is basically highest out of all my champs yet my win loss is almost lowest. I don't even play jinx often but i can win 3-4 games in a row with her. How does she fit into this season? My usual build is something like: botrk->pd->ie/bt->qss. This build used to do tons of dmg but now it just feels lackluster. How to improve?