Kalista...
Champion.gg - Kalista ADC Stats, Builds, Runes, Masteries and Counters
So people with 125+ games on Kalista average a win rate of 42.31% , now to remind you this statistic was taken off of Champion.GG which takes information from plat+ players. So basically the best Kalista mains are still losing the majority of their games because Kalista is about as useful as a cannon minion.
