Leaving Champion Select

I hate it when i enter champion select and someone types in "I troll" or "Mid or feed" but is last pick. So i just had a game where someone picked Nunu adc and said he was going to troll. I also get games where there would be 2 top or 2 mid since they fight over who will be where. It is unfair for me to have to exit champion select and lose LP + have to wait 15-20 minutes for another game. I understand why they made that feature, but i'm not going to spend 20-50 minutes being frustrated. There should be a way to fix this. I'm hoping the new champion select will fix it because this is really common in bronze, silver and gold.
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