What are the main cons of Obamacare?

This isn’t meant to be a political discussion I’d just like to gather actual facts as there’s a lot of fear mongering and misconception floating around. I mean, it’s not a bad idea in principal but in practice it seems to be a funding and healthcare disaster. Due to the way our country is set up, it would make more sense to have the individual states figure something out for themselves. Am I wrong about that? Let me know your thoughts.