After all, what happened to him?
Well, he had internal issues with the team. Apparently it was pretty bad, until now we couldn't really know what happened since each side had a version of the story but recently we have gotten a third opinion. Riot has just allowed TH to sign a player for LCQ, allowing them to use the "emergency clause", which means TH has given Riot enough proof that the situation caused by zeek was so bad that the team HAD to kick him. It must have been really bad since Riot hasn't allowed KC to sign anyone even if Newzera literally quit. So yeah we can't know for sure but apparently he brought huge problems, I imagine he will play in VCL next year
It had to be something insane like the players genuinely couldn't play with him on the team (refused to) or mentally broke down every game due to him. Guessing if the players are being negatively affected potentially outside of the game by a player inside the game, it could be proof enough that Riot can allow an emergency replacement.
I don't really know, what I've heard is constant verbal abuses with like a bullying vibe. But I do not know so I really don't wanna include something which is not factual, cause it's sort of misinformation. But yes, the rumor is something like that, at least something bad enough for Riot to back it up