I think he was just messed up. His brother (Jahmene's) committed suicide because of it all. The dad was just ultra abusive, and it shows on Jahmene with his quietness and behaviour.
I have to say, by Rihanna's standards, this is impossibly tame. She hasn't done anything provocative, nor has she written any swearwords on any part of her body. This song couldn't possibly offend anyone. Unless it turns out to be about Chris Brown, of course, because then, you know, BAN THIS FILTH. SET IT ON FIRE. REMOVE HER VISA. Etc.