404 errors

I deleted a lot of pages at once, and then the visits decreased very much within a day, then I found that what I did was wrong and then I redirected all the links that I deleted (410) What is the situation for me to return the traffic again as it was or what?

Anyone please let me know how can I resolve 600 url's which showing 404 error page in webmaster? Please give any short way to resolve. You can check here my url, https://pencil.sa/