Well his actions are for before he was adopted by lee eugene. He was constantly attack by other people for looking like an omega and he wandered on streets.
Though im not gonna defend him. He selfishly thought that mc wanted to abandoned him in the end. Like why? Did you not love each other as a family? Did you not felt mc's care and love for you before it happened? If he were to think a little deeper. I would've questioned mc why he never came back before feeling betrayed and hating mc.
he THOUGHT Ji Chan abandoned him, bro didn't even know the whole story and straight up slap Ji Chan's face, this MIDONT AHH I CANT TAKE HIM SERIOUSLY
his actions doesn't match with his backstory bruh wtf youre doing from the start