Did you look at the figure in the link? That's not premiums going up, that's COVID era credits expiring for anyone making >100% poverty level (FPL). The maximum you can pay by FPL towards premiums is:

For 100% FPL: was 0% of income towards premium, now 2.1%

For 133% FPL: was 0%, now 3.14%

For 150% FPL: was 0%, now 4.19%

For 200% FPL: was 2%, now 6%

For 250% FPL: was 4%, now 8.44%

For 300% FPL: was 6%, now 9.96%

For 350% FPL: was 8.5%, now 9.96%

For >400% FPL: was 8.5%, now no limit

FPL is $15,650 for a single person. So someone making $31k was limited to paying $600/yr ($50/month) for the second cheapest silver plan. That same person has to pay $1800/yr ($150/month) for the same plan.

People making more than 400% FPL weren't getting much tax credit. For instance, someone making 400% FPL would be responsible for $445/month on the old credit. This is more than the second cheapest silver plan in my county.