Unfortunately, the issue lies in the fact that English-speaking players are not accustomed to informing the raid about raid rules, which caused this entire problem. I understand that there was likely no ill intent, and it's even possible that the warlock deserved this glaive more than the rogue Stunstun. However, rules are rules, and they apply equally to everyone.
Every rule was personally written by me, and their sole purpose is to protect players and ensure their gaming experience on the server is enjoyable. Players in a raid should know how many contenders for their loot are already in the raid. If you're playing a rogue and see that the raid consists entirely of rogues, you're unlikely to join that raid because the competition for drops would be too high. When a raid leader decides to exclude mains and bring in their alts, it is unfair to other players, which is why we decided to regulate this issue with rules. Since you didn’t inform anyone that the warlock would relog at the last boss, this action was not allowed. This fully aligns with the rules, which are publicly available to all players.
I have great respect for English-speaking players, as do all of our GMs, and this decision cannot be biased—it simply makes no sense. Whether it’s a top donor, a top raider, or a regular player who just joined the server today, they are all equal. I kindly ask for your understanding regarding this decision.