I have been trying to remove like one year old cached pages and images from Bing's search results. The original websites are replaced with new pages or are redirected to 404, so removal tool rejects to the page deleting request, and I have to use the other option to delete outdated caches while there's no texts on the cached pages, or there's no text unique on the cached pages but don't exist on renewed page. Why is webmasters content removal tool so awfully designed this way?