Please, this is nonsense. It was not beyond his power. He was in power, leader of the D party, and determined the direction of the ACA.
Apparently, you weren't paying attention when the bill was originally passed. Obama had to make a slew of compromises in order to get any republican support, without which the bill would not have passed. The republicans got the bill they wanted,
My plan is going up 30% this year (family of three) with a 6000 deductible each.
Your insurance premiums are set by your insurance company, not the government. Take a look at how much their top executives are paid to see where your money is going.