from what i seen it takes the winning team to make few blunders/not closing fast to allow an elder/baron steal.
back in the day i was one of those never surrender guys,those come backs used to be most fun games.
sadly riots war on stalling tactics and forced massive team snowballs has made me change my view.
(riot has legit outright stated they made changes to reduce stalling and make games easier to close ect...)
now a days it more efficient time wise to just ff next. as it feels pretty hopeless/bad now,when you are on the back end, as all you can do these days is wait for the winning team to make a mistake they may never make.