Ridiculous The Dark Knight Complaint?

Ledger was BRILLIANT, and one of the few parts of this movie that didn't suck. Honestly, I'm glad I watched the movie online and didn't waste my money, but if everything in it was as good as Ledger, I would see it multiple times in the theatre. Ledger owned this role! Obviously this person has no knowledge of movies, acting, or anything cinema related. He's entitled to his opinion, but I'm entitled to tell him that his opinion is WRONG!