For me its when my family flew in for my graduation and they also decided to meet my sister's in-laws. After graduation we were supposed to go to a restaurant. The ceremony was supposed to last two hours but stretched to four and we were about to miss our reservation. My sister pressured me to leave even tho I didnt have a chance to take pictures with friends and such. I have mostly moved on but honestly a part of me still hates her for it.
I've mostly let go of bitterness, but I still think back on how all throughout my childhood adults failed to do anything at all about me being bullied even when I reported it, a thing I learned quickly was not to be done unless I wanted bullying to get worse.
I'm kinda broken now, socially. I have very few friends and feel crippled in social situations by the fear of doing or saying something wrong and betraying myself as a weirdo who deserves to be ostracized. I'm fixing myself and have learned that bitterness is like a pus that needs to be drained from a wound. But damn is there a lot left.
big mood