My client's ex website was full of copy-pasted news and the website's reputation was 0. Also, he wanted to get rid of Wordpress, so we re-developed his website and did not use old data.
But Google's cache is full of old page indices, more than 500k. More, new websites slugs are different than the old ones, so all the cached indices redirect to 404 pages.
I need to remove them but search console does not provide an option to handle this much indexes. What can I do?