To be fair for to some of you, you should put in the time and be able to play 2 characters from each section. I managed to get 2 buddies out of bronze elo (~1000) to 1800 and 2000 respectively. Although I was there to help and could carry easily if I played a damage and my buddies healed me; I still made as much of an impact when playing as a tank or support. Communication is key in this game and if you go into a game bitching about someone's pick you are just going to make everyone play bad and they will not want to switch. Learn to play more than one role and be friendly. Make sure you and your team engage in talking because that is the real secret no one is mentioning.