I think that Harry's natural tendencies to suppress things combined with Snape's tendency to justify everything that doesn't fit in his worldview worked against this in canon.  Well, that and according to the classic boy hero archetype, Harry must rise from an abusive homelife, stand alone, and overcome great evil.  (That's also why Dumbledore and Sirius had to die in canon, but I digress)

 However, if we're going by a true reality check, the Dursleys' treatment of their nephew mostly likely would have been tagged whilst he was in primary school.  He would have been taken into care at that point, Dudley also unless his Aunt Marge took him in, and Vernon and Petunia would have ended up in jail.  (And yes, I am considering a story about that...)