I would be angry about all of those things @Sans911, and I am really pleased to hear you say that you are. They are in no way trivial, and it’s all major disrespect. It’s olay to drop the ball occasionally, but you know when someone is genuine and has done that it error, and out of character ..... but what you are talking about is different here.
Your psychologist is “carrying an office” ..... her role is greater, with greater responsibility than the average Jo / Joe in the street. She owes you a professional apology for that.
You are showing self-respect by being angry about it ..... the feelings of self-sabotage can be a natura response for most people too ..... just maybe not so extreme ..... like eating a whole tub of ice cream (👋 guilty of that one).
I wish your cats were huggier..... would they cuddle with you in sympathy ?
Sending big “I appreciate you” hugs from me ..... I love that you have put so much into the volunteer role, and hate that you have been so badly let down ...... grrrr ❣️