How come riot only punishes the one type of toxicity that can be remedied with one click of a button

I've had people int to spite me just because I was in league promos. No punishment I've had people steal roles after being autofilled and then proceeding to ruin the game. No punishment. I've had junglers run down my lane and feed my opponent doubles because I didn't help them when they got ganked. No punishment.

Is there a button on the scoreboard I can press to get this behavior to instantly cease, kind of like there is a mute button?

So why is chat the only toxic behavior that gets addressed?