Toxic Environment.

[Chevronone]

I'm not even exaggerating...

"You're trash,"
"Go kill yourself,"
"Get throat cancer,"
"F*#$ing retards,"

...those are a few of the tamer comments Ive either had slung at me read thus far in my lovely chat.

[Chiramu]

"Go kill yourself,"

"Okay, you want me to feed the enemy team over and over again?" hehe
PVP environment is toxic in general, though some worlds might be worst than others. I think you might've just come across a bad group is all or bad groups. MOBA community is worst than MMO communities.
You can at least blacklist and report for the abusive language too.