Ranked and Auto fill

So,first I entered in a ranked game solo/duo (Im bronze 2,yes im a noob),and I usually play adc,i main adc ,and as an adc,i must have a decent support,so there is a guy named CarthaginianTyra ,that got autofilled support and I think that Lulu was the only support that he got. And my problem is ,that he was literally trolling , she feed, she went afk , she grief ( and I flamed in that match ,because i got nervous ,i cannot do anything with a bad support).In my opinion ,as an ADC, autofill its the worst thing ,why? Because I would wait 10 minutes to get a good support ,and win the game / or lose it ,but still having fun ,instead of getting an autofilled yasuo main that the only supports he got are Malphite,Yi,Lulu ,and in the best case ,Morgana. For others , that go only mid or top its the perfect thing ,because they dont have duo lane ,and they dont care. It wasn't enoguh that ADC its the worst ,easy to kill role in the game ,and now ,you must play with autofilled supports ,that ragequit ,dont comunicate ,steal your farm and die. Thanks for reading , i hope my opinion got to you,and I hope that most of the adc will understand me ! (And sorry for bad english ,its not my native language)