I deleted all of my posts and comments
Do you have a reason to get rid of everything?
The guy was giving me a hard time for spamming him with my poetic posts.
If you think you want to delete all of your own posts then that's well within your right. These are things that you personally posted and you have the right to remove them if you feel the need to do so.
I thought I was good with computers but I deleted everything.
I don't think there is anything wrong with deleting your own posts and comments. Although if you are spamming someone that isn't very polite. I'm glad you deleted it but don't be too hard on yourself for it.