Refer to this link:
Why another racist thread of this link can still be opened? Link:
The Steam Dota 2 Hub allows members there to be racist. Got idiots like members who are fully known as Coup and Kagami keep fighting there also? I saw another person known as BossGalaga likes to comment on other people also with funny words. Weird. What is happening to that Dota 2 Hub now? I saw people posting about this on Twitter also. I am not sure whether this is available on YouTube but there are a few servers on Discord that have discussions about this. I guess maybe Facebook have more about this.
Source: https://www.reddit.com/r/DotA2/comments/u700q0/want_to_know_how_bias_the_steam_mod_is/