How do YOU recover from a bad game?

So I just play my last placement match...and it was horrible. And it was almost all my fault. I picked Gragas, knowing his playstyle enough to not completely fail. Which is exactly what I did. I ganked mid and failed. I ganked bot and failed. I tried to get dragon and failed. I ended up 1/9/9. Of course because it was ranked my team yelled at me and told me I sucked. I tried to tell them I was having a bad game, and they wouldn't listen at all. When I was coming down bot for a teamfight half my team was dead so I tried to get out...and died. Of course they started yelling again, saying I hadn't peeled at all and told the other team to report me. I tried. I really did. I just had a bad game, but no one ever understands that. They make me play worse by harrassing me. Really. I feel sad when you do that and I get distracted. At the end Vel'Koz, a Silver III player, said to "never give low elo players jungle." I was placed in Bronze II, so I don't see much of a difference. People need to get that I play in your elo because...you are about as good as me. WE are not much different in skill, because Riot matches you with people as good as you. Don't call me a low elo player because you are one too.

So how do you guys come back from this? How do you shake off the idiots and keep your head high? I'd really like to know before I drown in abuse from this horrible community.