Well, asshole is not really a good way to describe it. He was an infamous adulterer, His wife claims he raped her, and he had a habit of working his band past the point of exhaustion (though he's not the only artist I've heard this levelled at). So was he human trash? I don't think that's fair, but he wasn't anywhere close to a saint, either.
Bob had (I think) seven children through affairs. His wife Rita also had an affair that produced a child that Bob adopted. My sister lived in Jamaica back then and knew all the "reggae royalty". She disliked Marley for being a misogynist but hated Peter Tosh even more for the same reason. She also says the local culture was that it was absolutely normal for both men and women to have many children with many different partners regardless of marital status. But she still likes the music. I have no problem separating professional from personal lives unless it is a politician who is being hypocritical.