The reality is that Rammus stopped being worth money, making a lot of the kills their team got, not really mean anything. Look at the gold difference.
Ok so lets see this.
So I really don't see how is this related. I don't believe anyone in this game gave up and demanded surrender. This was clearly game into red team favor despite the inter.
Meanwhile, in ranked solo I haven't won a single game when my team lost inhib pre 20 minutes yet in last 4 months. (The start of this season wasn't that bad and this wasn't happening as often either). And from 4 games 3 are decided basically in champ select with very little chance to win (though this recently started getting better as peoples are stupid and they are picking world's champions like scarner, gragas, urgot, aatrox, sion so games actually last longer than month ago now...).
Every game is winnable. That's not the point. People want to enjoy their game, and there are a lot of games where it isn't worth the effort to win.