When someone say he/she mains ADC, never hope and trust them. I had one ADC vayne said the same thing. I was like cool since she knows what she is doing, until the end result score is 2/12. Even her supp Blitz start raging and can't do anything if she kept feeding non-stop. I even went to check her history match which she did told the truth as she mains ADC but all losing games and feeding.
People have to start learning somewhere. Not really relevant to the board.
Even mains have bad games. You cannot judge a player based on one game.
I main ADC, but it's also my highest win rate. Saying you main something by itself doesn't mean much unless you have the stats to back it up.
That person should probably avoid Vayne though by the sounds of it. I can maintain a 50% win rate with her but have never finished with more than an A+ so avoid her in ranked more often now. She's too high risk to play consistently atm.
