Like every person ever Winston has negatives and positives as a person. He is problematic in his treatment of Julia, however I think his desire to incite change is admirable. Like the leading characters of many dystopian novels he finds himself near alone in his desire for change and is ultimately unsuccesful. In some ways he represents the sensibilities of an average person at the time of writing plopped into this dystopia. Orwell probably did this intentionally to make the novel more impactful.