I'm going to destroy a photo of me that my grandma has in her house.
That sounds rather harsh. Do you not like the photo she has of you?
I just don't like seeing old pictures of myself. It makes me laugh at myself.
I know it can be awkward seeing photos of you from a long time ago, but you shouldn't destroy property that doesn't belong to you. I bet your grandma loves that picture and would be very sad if it went missing. Instead, you should just offer her a new photo so she might put that up to replace the old one.
Oh no, I'm going to hide the photo.
Maybe hiding it is a compromise but make sure you do not destroy it because your family would be so upset.