The problem with the ACA is that it took the worst of each state's health care system and cobbled them together in a federal policy. If you think it was bad before, it's worse now.
Costs have risen and care has gone down. I used to be able to go to the doctor twice a year for free, now I can't even though I'm (forced to) paying for insurance, I can't afford spending $1600 for the family to do just a yearly checkup and some blood work.
The people that didn't have insurance before, still don't have insurance because it's still too expensive and more and more in the middle class that do have insurance can no longer afford to use it because deductibles are now in the range of $10k/year (it was sub-1k before).
Prior to ACA it was illegal for debt collectors to collect on medical debt as they do with personal debt (you couldn't go bankrupt on medical debt, it was there, but it had no effect on your general creditworthiness), it was legal to go across state lines and purchase health insurance, it was legal to pay for your health care out of pocket and most providers would work with you to make your payments. It was illegal to not provide medical care to the uninsured, now you have no choice but to sign up for insurance on the spot if you don't have it. Now, they charge the amount they previously billed Medicare (overinflated bills to cover unpaid insurance claims) directly to the user with no recourse for us because there HAS to be an insurance company in the way - depending on your state you may have had some or all of the above provisions which you lost with ACA and you can't vote on the issue anymore since large portions of it are by presidential decree.