(also your reply before was really interesting and I 100% agree with the jungle and support problems, but I'm starting to find if you just ignore your team's bad decisions and do your own thing they'll eventually start listening to you when you're the one that's never dying and getting really fed and they're all laying decapitated in the Dragon pit for the 50th time in a row :D)
I think ranked definitely has a mentality where everyone is thinking "I am going to carry this game." which makes it difficult to get people to realise what mistakes they're making or that you could be doing much better things, but you get used to it, just don't follow their dumb ideas and eventually they'll come around to see your way of thinking. The thing that I am finding incredibly annoying though is feeders/afkers/trolls/bots - I seem to have at least one on my team almost every game recently and it's getting really hard to win, but then I'm wondering is that just bad luck or is there a common factor if they're in almost every game? XD