What should I think that my girlfriend openly criticizes something that I organize?

Every year I organize a game tournament with my friends, and there are several discussions on how the rules of the tournament should be.

My girlfriend participates willingly, but showing no enthusiasm at all. She often criticizes my decisions or suggestions. It's on her right of free speech, but she does it on purpose. Once she decided to stay with us without playing, showing herself bored.

I'd prefer she doesn't participate, but she always does. It's embarrassing.

Why does she do this way?

What should I think that my girlfriend openly criticizes something that I organize?
Post Opinion