I know exactly what you mean. It makes the game an absolute chore to get into.

Just now I was reported by my entire team for deciding to tank as a Nox in assault because I "wasn't playing the right role". I was just trying to be helpful, and I personally enjoy Nox as a tank much more than as a damage-maker. Hell, Nox is played as a support more than a damage-maker in my experience.

I ended up being blamed for our loss (in a pretty close game btw) for no reason and everyone reported me. I was blamed for everyone else's mistakes too, it was absolutely insane. Our Thor, for instance, dived the opposing team's phoenix in a 1v3 and died and blamed me because I wasn't doing damage to help him (despite the fact that I silenced and rooted their Anubis).

So yeah, the game is toxic. Unfortunately, there's no going around it and reporting almost never helps, which encourages that type of behavior. Muting is probably the best option, but it doesn't take away the issue as a whole unfortunately.