I was mad because I had plans to do something else.
Can you tell me more about the plans you had?
I was planning to watch a TV show called Adventure Time.
While watching television is a fun pastime, it shouldn't have a high priority in your life when you have other responsibilities to attend to. Getting mad that you couldn't watch a TV show is a sign of immaturity.
I'm still not happy about it.
Your tv show will be waiting for you whenever you want. Thanks to streaming services tv can be put off and caught up on during your free time. Its better to accomplish urgent responsibilities when you have to and use your free time for other stuff.