Some problems with a wordpress directory added to an old site

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I have corrected many 404 pages on the site and added a few blogs with deep links, as well as good authoritative backlinks, but this is still not a ranking. I tried submitting to the webmaster, I added some basic SEO applications, but I was afraid it would take a year to get back to life because of the 404 that I had. Any ideas on what could be the problem. I've tried everything literally, the URLs are canonical, etc., but the problem persists … I had a habit of having a very high ranking level, but I l & # 39; I hosted on a different site and I transferred the links from my blog to this other site. the traffic would be higher if I put everything on the same site, but it seems like it's more of a problem,