This happened to me and I switched to using the babyliss big hair which has tamed my curly hair and leaves it with a bounce/curls at the end. My hair is now thicker and shinier and I get lots of compliments that I've never had before
Also check that you're not using any products containing silicone, e.g. frizz ease. My hair was literally breaking off after years of using frizz ease; I stopped using it about 3 months ago and I can't believe the difference it's made already.