If you can't look inside you, and find out who am I to, be in the position to make me feel so demagrated

The story:

I would go over my aunt's house eveyday and the family would just sit in my aunt;s room and watch videos all evening. Oneday I was singing the song and my cousin told me that I was singing it wrong and that it said damn unpretty. So when the song came on I made a mistake and still said demagrated and my aunt thought I had cursed. I told her what had happened but I had felt so dumb