Why is it that when I am going through a difficult time people in my life have minimal empathy? Are they not taking me seriously?

For example, at work one day I had a personal emergency come up and needed the rest of the day off and told my manager about it. She in turn wrote me up and asked me in a one on one if I want to actually work. It was disgusting.
Then around the same time I had to drop out of a committee leadership team because life happened and I couldn’t commit. I’d been on the committee for like 6 years. Then some girl FaceTimes me and tells me I “bailed on them.”
I lost my best friend a week before Christmas and my brother said “whatever you’re going through can’t be nearly as bad as what I went though.”
Then another friend of mine just said “sorry” and seemed annoyed when I was sad about losing my friend.

I can’t understand these patterns because overall I’m actually a kind and decent person. I don't know why people are so insensitive? I am told I’m very put together and polished all the time (thanks to high functioning anxiety) so maybe they think I’ll be fine and can take the pressure?

Why is it that when I am going through a difficult time people in my life have minimal empathy? Are they not taking me seriously?
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