I used to flame. My first year of playing League, I was sitting in Silver-Bronze. Over the years though, I found there's literally no point in flaming at your team members, as they'll just play worse and you'll end up less likely winning the game when everyone is tilting and flaming each other. There's no point. Just try to make calls and play the best you can. Also focus only on what you're doing. Just makes the game so much easier.