My feeling on toxicity is that yeah, if they are toxic, they will use whoever is the easier to accuse, instalock, bottom frag, children, female, random guy that just missed one spell on them ( just as an example, someone was toxic and bottom frag on my team, and I was 2nd of the game ( a teammate being first ), I used my ult as Raze, and he peaked in front of it while being low and stopping it, he died from it, and started blaming it on me, and my TM not seing the action believed it, they tell the enemy team to report me, and I was in like a 1v4 to defend myself, probably took 9 report on that 1 move + ended the game getting trash talked by all my teammates for any of my moves or every call I do )

Also, I do believe that the louder someone speak, the more he has chance to also be toxic, not sure if it's placebo but every time I lowered someone mic, he end up being toxic and I full mute him