It Is Impossible to Carry but you can do somethings to help.
For those of you who think it is impossible to carry you are right. I quit playing this game for almost a year when I reached Diamond 2 came back I was platinum. Knowledge is the key to carrying your team but you can only do so much I have been 30-2 in solo queue and still got the L honestly helping your team is key. The best way to carry is to get yourself a decent duo partner who you can rely on and help carry your team with objectives this is not call of duty kills do not win the game but they do help. Trade objective for objective instead of running from top to stop 5 man bot push when u could push with 3 mid and the 2 top just an example. If you see there is a troll in champ select then just drop queue in champ select I'd rather lose a few points then a lot. Feel free to check out my stream I give tips and answer questions I am currently in Platinum. Good luck summoners and I hope just these few tips will help you be more successful in ranked.