They doubled for one of a few possible reasons. If your employer gives you the insurance, they simply added to your share of the cost, and blamed the negro in the White House.
Or, you live in a Red state that refused to set up a quality exchange.
More than likely, it's due to a lack of competition, and a lack of funding that Republicans did away with. They forced 12 insurance companies to go out of business in '16 when they de funded the risk corridor program. That was by design, so that they could blame your costs on a failed law, when they were the ones responsible.
Or is could have been because the negro in the White House was to blame because he put in place a system that he knew was designed to fail in order that single payer could be forced upon the country. Add to that the Democrat's willingness to try and twist it as if the only reason Obamacare failed was because the Republicans didn't support it.
All of the things you posted point back to Obamacare being put into effect in the first place. Whether direct or indirect, none can have the possibility of occurring unless the Democrats first play politics to get Obamacare passed.