Demon-king's feed

I understand that the ML should have told the MC about her mother but he was a child living in a toxic environment trying the best he could to protect the mc’s mother from the abuse. Most preteens don’t understand how to manage their emotions fully so how was he supposed to tell the girl he fell in love with her mother was being abused severely by his own mother and father which later resulted in her death, he did what he thought was best ultimately which we know wasn’t the correct thing but I genuinely don’t understand all the hate.