The way a lot of people (like Zekken here) use "hater" nowadays in gaming is more like "doubter." For example, I might say "I'm a Skye hater" when I see a team lock in Skye, meaning I think Skye is bad and was the wrong pick here.

Zekken was saying he's pessimistic about EDG's chances against the other teams in playoffs (he's saying this right as he picks TH to win their match; he's saying that even though EDG is a higher seed he thinks they'll lose). It's definitely not a race thing. He just thinks the other regions have stronger teams right now.

The reason someone might say "hater" is to sort of self-consciously imply they're being unfair, to leave room for disagreement. I might say "EDG has been looking good lately, but I'm a China hater, I just have to pick TH." What this means is something like "I know the evidence suggests EDG will win, but I have been disappointed by Chinese teams in the past, and I can't get over my previous disappointment even though I know, logically, that I should focus more on recent results/current form. Sorry!"

copy pasted from u/Tommypynchon

THAT LASTED LIKE WINE