How to delete 3000 users where user-email is in a CSV file?

Hi, Presumably you have a list of the user IDs you want to delete? Or is it a range of IDs you need to target?
If you don’t have IDs then it would be my next move to create a list or range of IDs.
Suggest that you delete the targeted users from the “users” and “usermeta” tables using SQL in PHPMyAdmin.

https://wordpress.org/support/topic/safest-way-to-delete-30000-users-plugin-mysql-wpcli-database-error/