I have no way to judge you personally (maybe you are just that talented of a comic creator) but 99% of the time when I hear someone say 'better than canon', what they really mean is 'focuses on things I like more than canon does'. In the Harry Potter or Naruto fandom I've sometimes had people recommend me fics that they considered better than canon, and, well, they weren't. What they were, though was better forbidden love stories than canon, or better stories of political intrigue than canon, or so on and so forth. As someone who isn't particularly interested in those things, I thought the stories were way, way, worse than canon; the people who recced them to me, though, loved them.

I guess my point here is that there's nothing wrong with liking your headcanon better than canon; it's uniquely tailored to you, after all, in a way no one else's canon could ever be. That doesn't make you actually better than the canon creator or other fans, though. It just means you're good at creating stories you'd like to read.