september update

My website had been hit by sep broad core update and some of my main keywords experience drop in ranking. Till now I have applied many techniques to recover it but didn't get any benefit. Can anyone help me to sort out this issue??

Dear All, From Google's September 2019 Update my site's homepage ranking always going down when i redirecting my old domain to a new domain with 301/302. Someone, please help me. I'm so tired. Even my page ranking also down. :( Regards Rohan.