I had a meltdown today, I need to know if it was valid if not, how do I improve

So today I asked my father if I could go to the thrift next week, but tomorrow I'm gonna go to a art event and there will be old men there and all my shorts at the time were too short. So I got my grandpa and asked, he said he'd pay my dad and my father was taking a nap but I had a need that had to be met and it wasn't and that was frustrating so I cried to my entire family and eventually my father brought me to the thrift.