To be fair, SpaceX cost of 50-60 million per launch is almost a 10x drop in price, ULA is around 400-500 million per rocket. And since they have next to no competition on price, they have no incentive to lower it. It’s just business.
And don’t bring the broken vehicle the shuttle turned out to be into this. A great vehicle on paper, but with to many cooks. The shuttle era gave us the ISS, but is cost us almost all activity outside of LEO.