What's crazy is that Anthem is genuinely one of the least-bad insurance giants in America right now. The bar is incredibly fucking low.
Every healthcare system has issues, but universal healthcare beats the pants off the US system any day of the week.
Commonly complained about polish NFZ (which, unlike NHS, operates through contracting to semi-private and private providers), has overhead IIRC of around 1%.
I don't have links on hand (maybe someone more recently versed on US insurance can check?), but I heard of common overhead levels in private insurers in USA being in range of 30%, mainly for claim acceptors/adjusters.
(Not saying that's the right number, health care in the US is out of control).