Ranked is a very toxic environment

I have never seen people in any other game rage/afk surrender at champ select before the game even starts because of someone picking something they dont like or their pick getting banned or not getting what they want, Proceeding to actually ruin the game for the others. Players intentionally feeding while others are climbing, Players literally running down mid or going afk after giving first blood. RIOT THIS GAME HAS BECOME A HOST OF MENTAL CASES.