What’s something you struggle to explain to others?

Hi there! Today I had some stuff planned with my parents (some errands and such) and when I woke up (a bit later than usual because I slept poorly) but still earlier than the time we had agreed to leave and turns out they had already gone to do the things we were supposed to do together.

I didn’t need anything important, really but it frustrated me so much because we had plans and they didn’t go through with them. I couldn’t explain to them how frustrating and distressing it was for me that they did that because it’s not like I really needed something or really wanted to do errands, it’s the fact that there was a plan and it wasn’t even respected (which logically I know it’s my inflexibility but emotionally I can’t help but react to these things). And they kept asking me what I needed and why did I want to go to the shops so much and such and I couldn’t answer those questions because it wasn’t about that, it was about the plans.

Anyway, I’m wondering if any of you struggle with explaining things to others too.