continually seeing horribly mismatched games

I keep getting games where my bronze mid laner is matched up against gold players or above. how long do you think the influx of people in flex will last? What's the best strategy for dealing with a horrifying mismatch like this?

Rant: why the hell does this never happen on my team edit: it happened on my team. we won in 22 minutes.
what is going on with your matchmaking code riot?