I started working for HP shortly after Carly came in, and I had the privilege to work with a number of 30+ year HP employees. They had worked for (and in several cases personally met) Bill and Dave and they had nothing but praise for them. They also had an amazing loyalty to the company - a loyalty that took one beating after another under Carly's leadership.
Maybe you're right that no employee of a tech company has anything good to say these days, but it wasn't the case at HP for many years.
As to the current situation, I know a number of people that still work there and they are miserable - far more so than when I left 5 years ago. Things were tough when I left, but it sounds like they've gotten far worse over time.