I’m so confused as to why the first prince isn’t crown prince 😭

Destruction was his only power

His power was destruction, which meant that he attracted miasma, the evil energy of the world. We saw when Stella first arrived that he was surrounded by the stuff. People literally got sick cos of it. Someone surrounded by miasma couldn't be king. He is only able to wander around like he is now due to Stella's purification