Confusing website, ad placement, and username url

I just want to comment on several aspects of your service.

1. It is very confusing to navigate on your website. I cannot figure out how to cancel my account (I want to change my username).
2. The placing of some of the ads on your site is inconvenient and makes it difficult to navigate.
3. I would not have to cancel and redo my site if it was made more clear that my username would be my url.

Just wanted to comment and try and help make this site better.