Uh, every name is invented, FYI. Charnette just reminds me of charnel house and that's why I dislike it. Not because I think it's "made up," which is a ridiculous reason not to like a name.
It’s not great but it’s not THAT bad, it just looks like a combination of Charlotte/Charla and Anette or Antoinette. I wouldn’t use it but I definitely think it’s better than a lot of modern names like Everleigh.
Based on my findings and own personal impressions, this isn't an inherently "bad" name and it seems to be rather misunderstood. While I personally won't use it for my future children, I wouldn't hate on anyone who chooses to do so. It's not nearly as bad as my fellow commenters are making it out to be. A far worse name, in my opinion, would be "Abcde" and is an actual name being used more frequently. Give it a chance and be more helpful with your impressions. Just because something may sound "ghetto", doesn't mean it is. Do your research and form an educated opinion.
I've got a tip for you, folks: if you want a sophisticated, elegant name for your daughter, don't try to make one up. You can't. Just go for the ones that already exist and try something that doesn't sound like a brand name. Now there.