Dealing with Smurfs may be hard but it isn't impossible. League has changed a lot during the years and carrying games are harder than it was back then, so even if the smurf goes 10-0 if your other lanes are doing really well, you still have a good chance at winning. Look up iron to challenger videos or something similar, these good players still lose some games in low elo. The only real good piece of advice I can give you is to play as safe as possible, literally just sit back at tower and farm, don't attempt to trade or 1v1. Try to not give the smurf an advantage that he use as a lead. But yeah I don't like smurfs as much as the next guy, but you can take this opportunity to improve yourself like I did and learn what makes someone higher rank play different from someone lower rank.