I have one thing to say about people muting all in Ranks.
I know that there are some people who doesn't want to deal with toxicity but if you /muteall that means that you are refusing to communicate with your teammates.
If your jungle ask you anything such as Bait them to overextend I'll ult him to you Dragon call Baron Call or anything else please pay attention.
If you mute all technically you should have good decisions making and you don't need anyone to tell you what to do. Although if your team tells you strategic plans and you don't follow up because you aren't listening then there is a huge problem. IF you don't want to deal with toxicity then take a break from the game and come play later. Even if you are getting abuse, you aren't the only one who wants to win the rank game.
Technically Refusing to communicate with your teammates is a reportable offense but what is the consequence to that? I've never heard someone getting banned for that.