I think throwing it away is the way it will go. It's behaved the way it's behaving now since the beginning, and it never really has felt sharp, but at the same time, with an almost square tooth, it would be unlikely that it would have that same sticking feeling on your fingers that a hook blade would have.
I think either the blade is defective, was never sharp, or is just a bad match for an asian saw. When laguna was gung ho about selling these when they introduced them, I wish they would've taken the time either to get the blades right or to know which saws they work on and which they don't.