> Not sure what you've been sold, but there are no special rules or rigid methods.

I am not intentionally trying to be argumentative, but

- I have seen UX designers refer to a team of developers as "my developers" and I take it negatively.

- I have been into countless design sessions where the UX designers conducted a weird formalized session with cards, sorting, voting with colored stickers, and assigning equal votes to newly hired participants and senior domain experts. They were beyond stupid.

Sounds like your ego was hurt by a process that's designed to expose ideas from a group on a level playing field. The process was working as intended. If it upset you, it might be worth reflecting on what you can do to be more flexible and open minded, which is hard to do as we gain more experience in life.