My thought to each role in league...

3 years of playing league from gold 5 and peaked at plat 2, here's are what i experienced and observed.

TOP: -The highest concentration of gank - Also highest concentration of toxicity ( you already know :) #yasuo #riven mains)

JUNG: -Better jungler win -Most blame role from losing

Mid: - The boss -Blame jungler for not ganking and giving blue

Bot: - Also Better bot win :)

these are probably not enough though but feel free to add.