I just won a 4v5.....
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1744135143/200757353?tab=overview
Our Vel dc'd within the first 30 seconds of the game. But our team would always get picks and kill here and there and rarely behind in kills, even though we fell behind in towers. We attempted to surrender multiple times because we even lost an inhib when all we took of theirs was a single tower. They even started to just build armor because we only had ad damage.
But even though we were low in hope, we didn't try to troll, we didn't try to feed, we kept playing the best we could. If someone on our team got caught, we didn't yell at them. Heck, they would even call themselves out and apologize and say "my bad". And near the end something clicked for us. We started winning teamfights. Getting objectives. Acing them!
And the cherry on top is that on our final push to victory, Vel reconnects and said he had internet problems. We weren't even mad. It was a great game. Everyone got honored. Thank you league for that experience. It was amazing!