I'm Not in a Mood. I'll Get It. I Don't Know if I've Got ADHD.

My father remarried last year and decided to tell me by posting a video of this in the group chat and on Facebook. They did not invite a single person to the big day, apparently, so no one else knew. Most family members suspect his parents, my grandparents, already knew prior to the event. My question is, do I have the right to be upset and angry that she was not invited? And more importantly, that they decided to tell her in a group chat with my extended and rather distant family. But then again, that is your dad's daughter.