The facts:
- you resisted and refused to do many things asked of you by management, OK, but you can't expect that to go over well - you asked to leave instead of dealing with a purely work dispute - you mentioned your mental health and killing someone in the same day - you returned to work and publicly blamed your manager for something incredibly horrific (the death of your child) that they likely didn't even cause (the link between stress and miscarriage is - at best - tenuous [1])
I'm sure you're not a bad person or anything along those lines, I just want to emphasize how a change in approach could likely improve your life. I was curious how you've handled other situations, and I saw in your comment history that you've been fired multiple times. I'd really recommend looking inward and not blaming others for everything.
[1] https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-...