Google does not index the site, it says "Found, not indexed, what is the reason"?

Question

Google

I bought a 19 year old domain in the hope that there would be external links and everyone would be alive and all that, when I bought I was terribly happy. As a result, the Yandex site gobbled up all page 250 with a bang, but Google has 8 pages in the index, almost 4 months have passed, without changes. In Search Google there are all these pages in the status "Found, not indexed", but in other sections, there are supposedly old links that were not mine, that's ok.

Why is Google complaining?
How to crawl all pages?

ps All material on the site was written by hand 100% uniqueness

Answer 1

The status of the page "Discovered, not indexed" indicates that Google has not yet crawled the page. He knows about the page, but pushed back the timing of its scanning.
Most often this happens due to a heavy load on the site or a lack of crawling budget. Try to improve metadata, add pages to sitemap.xml, see what's with the link and send it for reindexing. A similar question has been answered in detail here . Read the detailed action plan.

Answer 2

Possible reasons:

1. lack of text
   
2. internal duplicate content
   
3. non-unique texts (you wrote them, but someone copied them to 10+ trust sites without a backlink and you turned out to be not the original source)
   
4. duplicate meta tags
   
5. rel="canonical" set incorrectly on pages
   
6. problems with lack of crawling budget
   

Answer 3

Tk drive them into the index through social networks as usual