
i think it might be because yohan drank both human blood and pureblood blood which makes him extra op because it somehow makes normal vampires stronger added on with hayan's parent's blood. All while hayan's parents didn't drink human blood so their full potential wasnt able to be used so yohan was able to become op and beat them

Because hayan's parents were kind.They had a soft spot for him even when he did all he did.He took advantage of that and I mean LITERALLY I had a look at raws and spoiler:
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He kind of talked about something sad which made hayan's father cry and hug him and while he was hugging Yohan pulled out his heart,not a big shock considering how he just played hayan.hayans mother also didn't try and fight Yohan(idk why maybe because she couldn't bring herself to kill the kid like that and then live without guilt)She tried to self destruct while hugging Yohan but he still lived maybe she had second thoughts in the end?
I'm glad hayan is not like her parents even as so many people tried to convince her to not fight and just hide she wants to take revenge and revenge only.Otherwise she wouldn't be abw to fight him at all considering how big of a motherfucker he is
Something doesn't click right with me. So yohan, my dude, is technically a half vampire cause he wasn't born with but was given the power since he drank the pure blood vampire's blood (Hayan's dad). WHY AND HOW THE FCK WAS HE ABLE TO DEFEAT TWOOOOO I REPEAT TWOOOOO FREAKING PUREBLOODS?! HOW?! HOW IS HE SO OP?!