instead of concentrating on what your team did wrong concentrate in what you did wrong, A good CS lead plus a well planned build can lead you to "carry" however you will never be able to carry a team by yourself, you will need the help of your teammates, supports and utility tanks (popular now) can still help you even if they feed, try to organize your team
other important stuff is morale, you have to keep your team's morale up, be positive and friendly.
ganking is not always about getting the kill, learn to evaluate situations better so you don't die to ganks, by dying to kalista you feed even more wood to an already raging fire
junglers are players too, that means they will also get mad at feeding lanes, try to talk them on putting pressure in the losing lane, they don't need to kill the enemy laner, its enough with keeping the tower alive
Pushing and securing objectives can win you a losing game, Stuff like dragon and splitpushing are always good
and finally, concentrate in your own mistakes and never blame your team, you're the one that lost not your team, that is the only way to improve