I'm an ADC main and we are people too, I should mention. But yeah some ADCs don't seem to wrap their heads around tank shred or how to position so you don't get blown up by assassins. We get hated on for being whiny and there are reasons that this is a stereotype. It's a shame being in low ELO and understanding my previously mentioned statement when you have ADCs in higher tiers who don't understand kiting it appears. Lack of mobility is inherent in many ADCs so you gotta understand that when you go into a game. If I'm playing an ADC against a bruiser like Olaf then I have to expect that I'm gonna need to kite to get a kill or even survive.
I agree that many ADCs need to understand how to deal with tanks (knowing it's our job to deal with them) and assassins. Positioning is key and you have to focus the closest, highest priority target you can WHILE BEING SAFE. Don't expect an ADC to target carries first, that's not their primary job. Top laners complain a lot about us and they need to understand how to deal with ADCs. We all have to understand our function in the game before we can legitimately point out the inherent issues of another position.
Ultimately, calling anyone who plays a role an animal won't be of any benefit to anyone and will only invalidate your arguments in regards to other players, and may possibly get you in trouble on these boards. If you don't like ADCs, just ult us with new Irelia and we can't auto for a few seconds.