There are a lot of people still unhappy with Obamacare, but an even larger number who like many parts of the ACA.
All the points that are in Obamacare that people liked (e.g. no denial for preexisting conditions, children insured to age 26) were also in all the proposed Republican healthcare plans. All the nonsense in Obamacare that people do not care for (e.g. tax penalties, etc.) were in none of the proposed Republican plans.