Learned something about ranked.

So, during the in-school year for high school students, I rise in ranked no problem. But every summer, it never fails, that i lose 3-5 divisions, due to high school kids deciding they want to get on league and troll nonstop. I'm so sick and tired of this bullshit that I don't even want to play ranked anymore without a team i can 100% trust. This shouldn't be how people have to play ranked. why should people who play the game legit and try to win every game they can, be queue'd up with people that don't even have common sense? is it fun to them to fuck up other people's games? over the past 3 days i've already lost 2 divisions from S5, when my kdr is almost always positive, and there's at least one person who decides they want to intentionally feed or leave the game completely, either turning it into a 6v4 or a 5v4, and everyone knows how hard it is to win a game when someone intentionally walks into lane and stands there letting the enemy kill them. i think there should honestly be an age cap for ranked...