Communicate With Your Team
Do you know what makes games unwinnable? It's not your build. It's not a bad pick/ban phase. It's not communicating with your team.
Just the other day i played with a guy that literally didn't talk all game. He was the jungler, so obviously our lanes were asking him to gank and help secure dragons. But he didn't. We tried to tell him that his build was bad and that he should change it. But he didn't. All he said the entire game was, during the last minute of the game, "You guys just needed a scapegoat."
If your allies are trying to help you or asking for help communicate with them. It's OK that you aren't ganking because you think you won't get the kill because you don't have red buff. Tell your laner that. Sure they may get mad at you, but you know what? At least they'll know your reason. Staying silent all game is one of the worst things to do as it limits your team-play severely, which is imperative to win the game. So the next time people are talking to you Talk Back, any communication is better than none at all. And who knows, it may win you the game.