People who don't fully understand the Symbiote, do; but, that's not what he is. Neither Eddie nor Venom is a dark reflection of Peter or Spiderman. Two different people, affected by the same Symbiote. Only similarity to reflect on is their powers.
Peter himself, when he had the Symbiote, became a dark reflection of himself; thus, Symbiote Spidey became a dark reflection of Spiderman. Venom is the result of its own entity; based off the personality & quality of Eddie Brock. A totally different being(person).
This why I think the writers have started messing up the character of Venom; because, they have turn him into something he original was not...over and over again. To the point, they have not a clue what to do with the character.