?

Shura was simply a golden child, with every opportunity available to her. Renfa and Lu Bu were always in a subservient position (except for the time when he was in the first king's family), so comparing their ability to leave the island is pointless.

Lu Bu literally said that he would kill "everyone to the last" of both kingdoms. And that was at a time when there was absolutely no point in continuing the war.

You can say a lot when your blood boils.