ADC is probably the least diverse role right now.

You should start a whinery

And vayne and kogmaw and caitlyn very often. What elo are you talking about, although i do agree i see ezreal every 2 games.

I've seen a decent amount of thrown in there, unless you want to count and despite not being found bot lane

Meanwhile I play vayne every game and have like 68% win rate in ~17ish games

I see every ADC.

I also tend to support more than anything else. I see good ones, I see bad ones, I see average ones.

All a support wants more than anything else is a good ADC.