You need to realize that she was your friend looked out for you was sick and also that management doesn't give a fuck about anyone. You are objects to them. She did what anyone who knows the struggle and cares about others would do in her position to make work better for those under her, it was probably hard and she dropped a bit of her effort while struggling with long COVID. But she sounds above any beyond anything you could ever reasonably expect. If you have a good boss it's not because they are just a "nice person" it's because they go out of their way to make things nice for people under them and they are rare. You may never see one again. So to make up for the other employees now facing a harsher regime the only thing you can do is be that person yourself and put forth extra effort for those under you and shield them as much as you can. Because now you know what it's like both ways. If you do that you've atoned as much as you can for the employees but there's not much you can do for her. You buried her, even if it wasn't intentional it was backstabby.

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