When I returned to work after my mum died in traumatic circumstances and my boss shouted at me in front of all my colleagues about a trivial mistake I had made on a piece of work I completed when my mum was dying.
When I cried in response and my line manager told me I was too sensitive and I needed to learn to leave my personal life at home. Oh and that I didn't deserve the (below market rate) pay rise I had received just before my mum died because my performance had since dipped (I wonder why). I was devastated because my mum had been so proud of me for achieving the pay rise and I felt like she would have been ashamed of me for letting her down.
When that behaviour continued for the first 5/6 months after my mum died while I was struggling with grief and guardian/caring responsibilities for a school-age sibling. Nothing I did was good enough and I was regularly shouted at and called names for tiny trivial mistakes. (I have decades of experience since then and everyone I work with now would consider them trivial mistakes that were not worth getting upset about.)
Oh and when that same line manager threw a strop in front of all my colleagues because I declined to work overtime in the last fortnight of my mum's life. And yes that woman did know my mum was actively dying.
Neither of them offered condolences let alone any other support. They made my life hell in the aftermath of something that was already horrific.
I was 20, a year into my first proper job, had been caring for my mum, was suddenly responsible for my school age sibling, was completely traumatised by what happened to my mum, and felt like I deserved the way my boss and manager were treating me. I didn't yet have enough work or life experience to realise how wrong it was - I do now and I look back with horror. I spent years blaming myself and feeling I wasn't good enough. I still panic when I make tiny mistakes at work.
I now manage young staff of the same age who are in their first proper jobs - if any of them ever experienced anything in their personal lives like what happened to me, we would bend over backwards to support them. Genuinely support them.
I can't even begin to understand what possessed those people or how they justified their behaviour to themselves.