Japanese people are polite and bronze is trash

Yep. That's data.

Not sure if anything meaningful can be taken from it though.

For the region side,

Are they AFK more/less because of different social standards, or are they AFK more/less because of differences in average internet service stability?

For the rank side,

Are they AFK more/less because lower ranked players are more apt to troll and/or rage quit more, or are they that rank because they AFK more(intentional or not)?

where is the chinese server and SEA server?

Lol data from league of legends = a whole race of people are polite.

Is this supposed to be satire?