Dealing with an arrogant partner can feel like walking on eggshells, but I've found that humor and patience go a long way. Instead of confronting them directly, I sometimes playfully tease them about their 'supreme confidence'—it lightens the mood without escalating tension. For example, if they brag about something trivial, I might say, 'Wow, should we call the Nobel Committee?' with a grin.
Another approach is to subtly highlight teamwork. When they dismiss others' ideas, I reframe it as, 'That’s an interesting perspective, but what if we combined it with X’s suggestion?' It shifts focus from their ego to collaboration. Over time, I’ve noticed small doses of humility can rub off on them, especially when they see others thriving without arrogance.