After a month google started deindexing my website and due to our one tiny mistake this action got its pace and almost whole site was deindexed then we fixed our that mistake and also removed every wiki page now we have only a few hundred of pages.

Its been more than a month since we removed every wiki and other possible thin pages yet google search console shows around 24000 discovered pages and keeps showing some urls which doesn't even exist as indexed we submitted Validate fix options but it looks like it is of no use and we don't have any manual penalty or issue shown in search console.

We are now recreating every single page on our website though on frontend it shows same old pages but on backend we are cooking something and will launch it at once but we want to recover from this problem or penalty or whatever it is before that.

You can access my website from google as if I write link here hackernews will most likely hide this post from public.

Can someone explain what this is and how to recover from this professionally