Vayne seems to be a bit overpowered rn

After 2 games with my duo support, where I played Twitch in the first and Ashe in the 2nd (because Vayne was stolen from me both times) and my duo used Sona for both, we faced a Vayne both times. All was well the first time because I automatically assumed that because Twitch was known to be a Vayne counter, the game wasn't going to be all that bad, however soon after winning a relatively easy laning phase, all Vayne needed in the late game was about 3-4 core items and she was shitting on my entire team including me before I could do any real damage. This didn't stop me however, because Vayne being known as a late game hyper carry wasn't all that alarming for me, however the tilt settled in after I lost the 2nd game to her as Ashe who is said to be able to counter her, after losing both the laning phase and then the team fights. My team had relatively given up seeing that none of the games ever seemed to end before the late game with her in it, and she ended up shredding tanks, assassins and ADCs alike when coming to the end of it. For a champion widely regarded as one of the top 10 most difficult to play, she sure has a pretty high play and win-rate out of all of the other ADCs in LoL, and is at the point where I won't be surprised if she ended up being more banned that Zed when the season settles in. Would be great if Riot could do something about her before this becomes a bigger problem than it already is.