The Cigna Group reviews

Pay for performance culture based on a bell curve, so some employees are ranked as "needing improvement" aka poorly just due to needing rank employees. There also used to be rampant favoratism, but that seems to have ebbed recently.

Very little upward mobility, therefore people become very cutthroat and try to keep others down rather than focusing on doing good work. Also, the company's business has contracted or stagnated since 2002 (company is about half the size it was in 2002), so there is the constant spectre of layoffs and downsizing, but it's never planned strategically. Death by a Thousand Cuts, I call it.