Yes, insurance companies are generally evil, and yes they take some control away from the patient. But that was the case before obamacare, it's not like obamacare made it that way.
You are still free to come out of pocket and pay for things not covered by insurance just the same as you were before obamacare.
I don't like obamacare either. But I'm against it from the left point of view. I want a single payer system, Medicare for all. And I think the medical plan the people in congress get shouldn't be reserved for a few elites. We should all get the same plan as the people in congress.
And again, if you want something that isn't covered, you're always free to pay out of your own pocket for it. Most people can't afford to do that which is why having insurance is so important.