He added that employees should "tune out" criticism of the insurance company, saying that it "does not reflect reality."
Anytime someone tells you to ignore the advice or criticisms of everyone else but them that is the reddest of flags. Literally abuser behavior.
The posts about claim-reversals are just something I've seen a few posts about here and on FB, no news sources.
I do have a semi-related Snopes article: https://www.snopes.com/fact-check/anthem-blue-cross-shield-anesthesia/ Anthem BCBS had an unpopular anesthesia policy that they walked back on December 5th. Probably a coincidence.
But also, here's several stories about people expressing their outrage.
Americans hate their private health insurance
Brian Thompson’s killing sparks outrage over state of US healthcare
UnitedHealthcare Denies More Claims Than Other Insurers — Angering Patients And Health Systems
After shooting, UnitedHealthcare comes under scrutiny for AI use in treatment approval
All of these had been in the news, but the killing has pushed the conversation center stage. It's a strange and funny time too, since Trump is promising to roll back the ACA and make all of this much worse. People apparently just have no idea that the ACA and Obamacare are the same thing, or that it's the reason they even have insurance at all.