No I don't think he hated it. He loved his mother and that's why he went to his father's side to protect her(she was sick or something) but failed. Now he's just waiting for revenge
Spoiler...
You're right. I got confused with the other guy, his first self who hated his hair color. I remember because at some point, it was a dark humor of sorts. The first self wanted black hair like the royal family but he had silver hair but in this life he had black hair but he wanted silver hair like Teseon.
Still. I think his stupid father and bothers had silver hair. That's what set him apart from them, no? It reminded them that he wasn't part of their family.
I thought the boy hated that he had black hair, from his mother's side as compared to the royal family who has silver hair...did I get it wrong? So, shouldn't his bastard of a father also have silver hair?