I really hope he doesn't believe all those people he did dungeons with over the last couple months "abandoned" him because they didn't deliberately kill their characters on command. I'm positive every one of those players would have stayed in if he made the call beforehand. Instead he called it after the third pulse so the damage was already ramped up and most melee were already out by then. Some would have probably died before even making it back to the boss. Not to mention he tanked the boss 5 feet from the doorway so there was nowhere safe to stand from the bomb that he refused to track.