Why do premades hold high report cred???

I've been banned multiple times. Every time without fail it's some trolling 4x premade and I'm the solo and they make the game completely unfun to the point where I have to point it out. They tell me to eat dicks, they tell me they wish I was dead or contract any number of diseases, or I should go kill myself. Then they "lol" and report me for anything and instantly I get a ban! The fact they were out to ruin the game for me (and it's always me, I'm always the unlucky one to get these toxic players) should make their reports worthless, not able to permaban me! Will I come back to the game? No. Toxic players should be clearly identified. And if the toxic players are the ones banning innocents, this isn't a fair system. It is a system that bullies rule, and are able to pick on solo queues. Their reports hold too much weight. Especially when they are literally only playing to cause misery for 1 unlucky victim each game, and to add insult to injury, they get to ban that person too! Should I have AFK'd out? Well, that's a ban too. The kind of disgusting language I need to sit through should get these people arrested and thrown in jail, not just banned from the game. But thanks Riot, I've been playing since Beta, and some troll premade finally banned me. You lost a paying player and one of the good ones! Your loss, not mine.