What happened to them was hurtful, I understand and sympathise with that. However when one steps back and reads their responses, coupled to an extent with their writing (of course someone else would reach a diff conclusion), they appear to be an aggressive and maybe even vindictive character.
You can't really quit the way you did, and then still dangle things like [0]. People who utter such things out can portray an "I'll get you" attitude.
Then when someone responds and you're unhappy with their response, you agress and call them a mtherfcker [1].
Some might consider it to be too late, however some form of mediation might still be necessary.
[0] https://cohost.org/ThePhD/post/2720152-mn#comment-fdd4ee8d-9...