My Site Got Hacked, 2300 Spam Pages Were Injected And Google Indexed Them! What Can I Do Now?

So I know it sounds bad, and it is. I have a small business specialized in event parties. I basically worked on my SEO and local SEO for the last two years with great results. I’m still not making a living from it, but enough for a part-time income.

The thing is, one day in December I logged into Search Console and discovered more than 2300 indexed pages, all redirecting to a super spammy dropshipping website selling clothes.

This is how I discovered a backdoor on my website. Long story short, I think I fell for a phishing scam... Totally my fault, I know.

I redirected all the spammy pages to 401 (I read somewhere that Google reindexes 401 more frequently than 404), resubmitted all my official pages to Search Console for indexation, and cleaned the project. No suspicious files or modifications have been detected since this fix.

The problem is, as you can expect, my impressions and clicks dropped almost to zero. I lost all my hard work, and I’m feeling really stupid right now.

Still, I’m convinced that my business offers activities that will remain trendy in the future, so even if it takes months or years to rebuild, I want to do it. The games I sell are already functional and unique in my area, new products are coming soon, and I have a pretty niche business.

The thing is, Google is deindexing the pages very slowly. From the 2300 pages, it deindexed maybe 500 the first month and 300 the second. Now I still have around 1700 spammy pages indexed and I don’t know what to do. I tried the content removal tool, but I can only submit about 10 pages per day.

My question is: what can I do now? Just wait for Google to finally deindex the spammy pages and continue producing new, high-quality content for the website?
Is buying a new domain name, redirecting the pages from the old one, and starting fresh a better option?
If so, can I simply create a new website with WordPress and save everything, or should I add the pages and blog posts one by one to the new website?

If you have any experience or better ideas, I’m in.

To add context: the name of my business is not really important. My clients don’t find me using my brand name, but because I solve a problem they’re looking for.

Any help would be very appreciated. And yes, I know I made a huge mistake, don’t be too harsh, please.