Check this match out.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2391692186/225715083?tab=overview
It looked pretty bad. That Ashe was crap and was always out of position. I would try to protect her but she just kept pushing the lane hard then Thresh would run around/through the minions and hook her. I stun them but she wont run. So when the first tower falls Yi gets a tripple and I see his skills. I had also been watching top. Kayle isnt doing bad against Riven, cause shes bad, but she cant get CS cause Amumu was camping her letting Riven get ahead in gold.
So when bot tower falls, I roam the jg with Yi to keep him topped off with healing and poking some of his camps for faster clears. Then when he goes for ganks, hes taking a Bard with him. This gets Yi strong enough to 1v1 any of them fairly quickly, even Draven. I turn my attention to top and helping Kayle vs Riven doing to Riven what Amumu was doing to Kayle, making a 2v1 threat to pressure the lane. All the while Ashe is bot just holding the lane trying to pick up farm.
Heimer was a trooper the whole match. He saw the match going bad and bought a Zz'rot and placed his turrets near his tower and just HELD MID. That was his game. He changed to meet the issue at hand. That issue was that we were behind and needed to stall to catch up. Eventually I get a Zz'rot too and this stalled the game out more.
At a certain point I land a good Bard ult, let the team get in position, nail the stun, Heimer nails a stun, Kayle and Yi grind their HP taking out Draven and Kayle, maybe Ashe lands a stun we didnt rely on her for much, but when she did something good it helped.
We won that game. At 10 min they were ahead by 3.1K gold. At 19 minutes we have evened it up roughly with them ahead 125 gold. We get ahead some, then they even it up, and by 33 min we end the game ahead by 8.5K gold. Were even still 2 kills behind them, but objective gold racked up so quick.
I know, I know, its just one match.
I have a few others that I could hunt down that are like that. Not everyone knows how to turn a game thats not going their way around. Just happend that we had enough people on one team this match that knew how to put their head down, hold out, get some farm, play safe, wait on team, and dont chase kills that we were able to fight off the super fed Draven and Riven.
The next couple of minutes in this show display what turning the tide should be like:
https://youtu.be/qbKirlDjVyY?t=206
Notice that they just sit... and wait for the opportunity to present itself (just like in Overwatch, proper defense play should be a bit boring if done properly), they dont force it, it and they take victory.
Also this video:
https://www.youtube.com/watch?v=7M0nlqLpqNY