Before if you had minor medical stuff insurance was there. But as soon as you got legitimately sick (e.g. cancer) they quite literally went back through every form you ever filled out looking for an error, typo, or omission in order to cut you.
Worse still they actually designed forms to increase the chance of error for exactly this reason. Did you ever wonder why you have to sign it three different times on different pages? That is why.
Plus if you got laid off previously you were in deep trouble since your new employer's insurance company would reject you and you'd struggle to work while sick regardless.
Honestly Obamacare improved things decently. Only short-sighted greedy people are unhappy. Next challenge: Unlink health insurance completely from employment.
Health insurance from your employer is bad for everyone. It reduces consumer choice (e.g. you have the "choice" to either go with the company your employer picked or nothing), and it makes SMBs much less competitive than large corporation.
Startups in particular struggle to offer employees health insurance even if they can afford to offer a competitive income (as they pay disproportionately more for health insurance than a much larger company).
At least an argument can be made for why the "public option" (nationalised health care) is a bad idea, I've heard no good arguments for why unliking employment from health care is. Except "I get really good healthcare right now and I am too lazy to shop around for it."
The only organisation that should be allowed to offer their own health insurance/care is the US military, and that is more for practical reason.