Getting crit by the enemy adc is the worst feeling in this game.

Especially if it's from a vayne who does 1/2 of your hp with just 1 q empowered crit. It's so frustrating taking 2-2.5 times the damage that should normally be done from 1 attack. Especially if the enemy adc has 50% or less crit chance. This is the difference between managing to kill an enemy adc in a duel, or him getting 5 crits in a row and shredding you while getting big bursts of life steal. When I have the patience to watch an lcs game, I see mid-late game team fights decided by whichever adc gets more crits, and not by which team plays the fight better. This effectively makes the game come down to a few dice rolls in a few seconds.