What to do in a Situation like this?

I'm in a draft pick in ranked as last pick so I have nothing I can do. So our first pick guy picks let's say "Jungle" Rengar and locks. After a certain while the 3rd guy also picks "Jungle" Yi. Both then started throwing words at each other in a heated argument. Both people are hard-headed and insisting on that role. And then after that they rage like "I'll feed and troll" and things like that. I even waited until everyone chose his champion and no one wanted to leave. They both wanted each other to lose. I dodged it and lost tons of LP. What was a supposed to do then? waste 40 minutes and lose more LP?
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