When your teammates honestly want to lose.
So i just finished a ranked game as azir and i honestly couldnt carry my team. Before you get into saying "your solo carry mentality in a team game" "If you think youre that good, you should have been able to carry your team" yada yada ya... I had a maokai that died to fizz top at least 5 times in lane, i had an adc that ran teleport, and a jungle nocturne that build purely glass cannon against a kha jungle.
And i tried to have a positive attitude, i tried to roam as often as possible, but each time i would ping that i would roam they would die before i got to their lane and i would just have to clean up. late game, i asked everyone to group and play around me, which sounds conceited but as a fed azir i could dish out tons of damage as long as the support and top laner could peel for me. but they of course never listened and continued to chase people out in the jungle and get caught and die, thresh didnt know how to build for thresh at all, didnt peel, all he did was get caught and cause other people to die.
So how do you win ranked games when all the shit heads on your team wont listen to you? Its hard to be nice and say nice things to them when theyre are absolute garbage