It's the Support Meta.

ADC's are worthless on their own, with few exceptions. Supports just keep getting buffed and now they're bloated. Nice job. First ADC to get a lead wins, with few exceptions. It really doesn't matter what ADC is being played as long as the support wins lane. Everyone is banning a handful of ADC's each match, even though they're all basically the same statistically (except Draven, Nice work there). The problem is now supports get as fed (gold) as their ADC's so as soon as someone grabs a lead it's a done deal. It used to be more balanced. The ADC was ahead but the support wasn't smashing the door down, now they both are. You could still clutch a bot fight from behind but now it's just wombo. It does't help that nobody is tanking again. Again took it the wrong direction. Destroyed health pools, left % damage, and didn't address the movement creep. Next up assassins are going to be buffed to address the problem, and now we are full circle.