Obamacare's unpopularity

Soo, back during the 2012 election, when people learned of a girl w/ a heart murmur that could get health care now - Obamacare became more popular. Now, it is less popular. Why? Because of the power of video. There has been lots of ads against Obamacare lately, so people like it less (even if the issue remains the same.) Why are these ads running? Do people think they can repeal Obamacare (after losing the election?) Also, I thought the insurance companies got on board (once the low-cost government option was quietly removed.) So who is funding these ads and what are they accomplishing?