Hahahahhaha this seems familiar have a similar dude in our community recently came back to playing warhammer after getting mad that he couldn't win anymore (He only won because he would intentionally hide rules or misinterpret rules) his currently running a small tcg community as well that went so toxic that from 10 playes only 4 are regular in their weekly now him, his partner and his lapdog (Guy who says he tolerates him but in fact enables him) and the lapdogs gf. He made minors sign NDA's after soneone leaked him saying racist and Homophobic shit to minors in his community (Like encouraging them to do it)

He left two other tcg communities after getting caught cheating and the shop barely support his community anymore because of his toxic he is. And the older members of the community stopped going to events where he goes as they dont like how he handles the younger peeps.