Well the same could also be said to the dragon. If he's telling their story to a human living in the modern times where human rights exist already, he shouldn't expect the human to understand it right away. Even the thought of conversing with a mystical being and allegedly birthing an egg is already such a wild idea already to a normal being.
Okay cool. And the MC can choose not to be with that immortal creature and get together with a decent being who actually cares about him and has never hurted him before. Easy as that, hope this turns into a story where MC meets a 2nd Ml and they end up together instead like that one other historical bl.

He’s a dragon, an immortal creature, not human. So why expect him to have human morals? Of course he’d act terribly; he doesn’t think or feel like us. Don’t impose human standards on a being that isn’t human, it makes sense he sees humans as beneath him. Do you get what I mean?
but its okay if yall didnt get it but for me, thats his character, he is evil, even human can r , whats stopping a creature that feel superior than human?
remember, this is talk about FICTION but real-life okie...be mindful...