You need to stop watching Fox News.    As someone who is on both Medicare and Medicaid, you obviously have no idea what Obamacare plans cost, and what benefits are provided.   You are just spewing talking points from Hannity and Carlson.

The reason why a state like Nevada is having problems is complicated, but there are two factors that make things far worse than they need to be.   The first is the actions taken by Trump that are destabilizing the markets -- including not paying "cost sharing" subsidies (that allow for lower premiums for middle class and working class families), and not enforcing mandates.   The second is that Nevada has done next to nothing to make sure Obamacare works, thanks to the fact that state government has been overwhelmingly GOP since 2011.

(hint -- why does a state like Idaho have at least four insurers in each county in 2017, but a state like Wyoming has only one in each county?   The difference is what the STATE is doing.)