What to do when someone ints?

I'm sure this has been answered at one time or another, but what are you supposed to do with a teammate that intentionally feeds. I recently had a shyvana on my team who decided that victor top was a troll pick, and proceeded to give the zed mid 5 kills in 5 minutes claiming it was victors fault and that we should ff 15. Obviously we all reported them, but what am I supposed to during the game? Try to carry despite the impossibly fed zed? Lay down and open a lane up? Neither of these are particularly good options, so my question is just what do I do? I just want to enjoy this game, even in the worst case scenario.
Report as:
Offensive Spam Harassment Incorrect Board