[GloucesterChief]

It just surprises me that they were so subtle with Ward's backstory but didn't have that with anyone else.

Spoiler!

It is quite clear that Harold at the very least verbally abused if not physically abused Ward since he was a child. That is also why Ward also bullied young Danny. Hence Ward saying that his happiest day was the one that Harold died. That is why he is so eager to kill Harold after his second resurrection. Harold was already an abused before he died the first time.