Why is silver so much more toxic than bronze?

Toxicity generally lowers win rates by tilting allies and degrading team morale.

I played from B5 to S5.

Sure, bronze has a lot of feeders and people who make dumb plays, but most of them were pretty happy. Team mates would actively encourage each other. You had people going all-out to be positive. Stuff like cheering on the guy who picked Teemo into Garen and was 0/4 by the 15 minute mark.

If anything, people would try so hard at being positive that it would come across as fake and vaguely annoying. That was definitely better than directionless, toxic rage though.

In bronze, I'd usually only mute one person, about every three games. It was almost always the ADC. I main support and there were some Rambo ADCs who would make bad plays and die, then rage at me for not going in and dying too.

In silver, my mute rate is more like 3 people per game. AFKs, intentional trolls and childless, directionless racers are much more common here than when I was in bronze.

Through my whole climb out of bronze, I encountered one intentional feeder, and no dedicated trolls.

Silver, it's like at least one a game.

I'm still climbing slowly though, because the enemy team always gets it as bad as my team does.

At what ELO does the community get nicer? Also, why is silver more toxic than bronze?