The ACA increased costs far beyond what they otherwise would have been. It made the cost of good health insurance go up 25% overnight where I lived. The discontinuity in price increases before and after ACA were pretty stark, and not in a good way.
There are some charts of health insurance costs over time [1] here. These charts look the same pre-ACA and post-ACA. Costs continued to rise at about the same rate has they had before.