If they disapproved of the law, they would have elected the party that pledged to repeal the law.
The answer is still the same. We need the Senate and the House in order to repeal.
The rest is wishful thinking and theatrics.
During last year’s election season, Obamacare wasn’t yet implemented, nor was it being discussed much by either candidate. Therefore, it wasn’t the foremost issue on voters’ minds (though it should’ve been!) and voters cast their ballots for other more superficial reasons (i.e. - “oooo, I just can’t vote for that cold, heartless, greedy, rich businessman Romney for dissing 47% of the voting population”). But I do agree with your final point... We MUST capture the Senate and the House if we’re ever going to have a real chance of ever outright repealing this heinous law.