Ok, this support circlejerk has to stop.
Look, I get that supports get flak. I really do. I've had it happen to me, since my main's primary lane (mid) is often taken. However.....
Over the 50 or so support games I've played this season, I've had maybe two had these abusive ADC stereotypes. I muted them within 5 minutes, and that was the end of it. And I don't think I'm just getting lucky myself either; I can go for several days without seeing a single toxic ADC, because for every toxic ADC I see a toxic player somewhere else.
If you want to complain about how many toxic players there are in the game, go on ahead, I don't really blame you. However, supports, please stop making yourselves look like frickin' martyrs, because ADCs are not demons created to make your existence hell. TBH I see far more toxic top laners than ADCs.

quadra) and they don't get the impressive KDA after the game.
So if someone hops into a blind que and 'out of the goodness of their heart' plays support, and then get raged at, it'll make more of an impact than if they get the roles everyone wants.
IDK what to say about any ACTUAL support mains who always complain about their adc.