I need some tip's on getting my "elo" raised in League of Legends?

Every single Time I play ranked matches I always get the team that either has a player DCed or doesnt communicate you I get the Trolling YI / RYZE that are always like "OMG U ALL SO BAD I GO FEED NOW.. I really can't stand it I hate being in the hell elo in solo que I can never get a good game with ppl who communicate. What are some tips to get it raised up a bit cuz this really sucks.