Teamed with a 4 man premade

Really rito. Why do you allow me to be paired with a 4 man premade. They utterly sucked played tristana mid was a total fail. If this happens one more time i will fucking quit this game. there is literally nothing I can do. They rage on me as support all game because enemy mid lane TF raped us and our tristana couldn't do anything. I do not mind playing against a 4 man premade but please give us an option to opt out with being grouped with one. I mean really wtf is this shit there is literally no control you have when this crap happens.