ACA health insurance will cost the average person 75% more next year

The ACA was originally designed as a "three-legged stool" of nondiscrimination (insurance companies can't charge higher rates to sick people), the individual mandate, and subsidies.

If you remove one of legs of the stool, the market becomes unstable and you see price spirals like this.

Jonathan Gruber (MIT econ professor, and one of the designers of the Affordable Care Act) gave a fairly detailed talk about how and why they designed the ACA the way they did, learning from a similar law in Massachusetts: https://youtu.be/2fTHqARiV_Q?si=SRC6Np-rjgUgAe4Z&t=679

In this case they removed 2. Subsidies and mandates

And they also added requirements what must be insured and maximum out of pocket.

So you cannot have a cheap insurance with 20k max out of pocket.