20+ million more got healthcare coverage, plus the CHIP program for kids was passed so there definitely was improvement in that area. Prior to the ACA being implemented, health care had been inflating at an average of 9% per year, which did get significantly reduced up until 2016.
However, with that being said, the ACA did not do enough to curb medical inflation, which they knew would be a problem when they passed it, thus hoping there could be some consensus reached on trying to correct that. However, the Republicans refused any cooperative efforts.