What were the demographics of the polls? I'm not a health insurance expert by any means, but from my family's experience, the ACA has fucked over the middle class big time. Examples of that is small business was hurt (e.g. my in-laws had to let their employee count drop because they could not afford ACA mandates) and my parents' premiums and co-pays went up substantially, to the point I think they're very close to being in the same position as some others' family members mentioned above. Even the blue collar world has been affected to some degree (reference less jobs available in my in-law's town).
Now, I do know there are a lot of blue collar/choose to be on welfare types that love ACA (again, referencing my in-law's town). It's damn near free health care for them, why wouldn't they like it? That crowd also doesn't care about less jobs in reality because they're happy to stay on welfare/suck at the government's tit for the rest of their lives. Bottom line, healthcare is fucked and needs an overhaul, and it blows my mind that anyone in the middle class with sense thinks ACA is the answer.