it is highly unlikely that hosting your site on a subdomain will solve the underlying problems of the site as hosted on the main domain. there were 2 Google updates during December. which do you think affected your site and why?
I don't know the one that affected my site as both updates were kinda running concurrently.
tangor
12:38 am on Jan 17, 2023 (gmt 0)
There is always the problem of inheritance. Try to find out what happened, and work on correcting that issue--a sub-domain will not likely make much difference.