I'll say it once, and I'll say it again, Riot, fix your fucking matchmaking.
Shit like this happens ALL THE TIME in my ranked games, no, this isn't winnable, no, this isn't fair. It's 20 fucking minutes of my time wasted, being helpless because literally 3 of my teammates are AFK. If it's not this shit, then it's Diamond players on one team, and Bronze on the other. Good fucking shit man, it's like you expect low elo players to learn when shit like this is more constant than your mother bitching at you for no reason.