None of these guys live up to their rhymes, that partially by design. Rap is like inhuman sometimes.
Two: none of these guys are actual "gangsters" or mafia bosses
three: the mafia bosses and gangsters aren't living by these values most of the time lol
falling out over women is a timeless thing for people from all walks of life. it's not endemic to rappers or street rappers, but yes, there is some irony there. The reason they do all that "hard on hoes" rhetoric is because it sells. Not because it's any realistic way to live a life. but, of course these guys are petty and jealous, and vain and all sorts of things.
Future's whole rap persona is like some kind of a trap star "douche bag" and I like his music sometimes.