ADCS in the start of 2018

This is probably just me, but lately I have been noticing a trend in a majority of my ranked games. I am an ADC main and for the past few days in ranked, the only ADC's I have been seeing are: Vayne Tristina Xayah and a few Ezreals (but he isn't as good anymore) What I usually do is ban one of them, usually xayah, and I plan to play vayne, because I loved her even before she got all OP. But sadly, they always end up picking vayne before me unless I am first pick and a higher up pick. Then I have to play tristina, but not many other viable strong ADC's exist to match vayne's late game hyper carry damage, except maybe kog'maw, maybe twitch, but kog requires good support/healing/sheilding if you don't want to get burst into pieces. And I am good enough at twitch to play it in ranked yet. Yet, vayne is also one of the most banned adc's so far, so I have to have another pocket pick, which one of my favorites and the only ADC besides vayne/trist is my KALISTA which I have been spamming since i love her so much as well, very good in lane and dominate, but unfortunatly, falls off pretty hard compared to all the other picks currently, so kali is kind of a risky pick for me, but nonetheless, a viable pick. I just wanted to say, that most of the game I have played so far have been filled with only vaynes, trist, and xayahs!!