Repair the "mysql" database tables from Maria DB in linux server

Job ID: 32460097

Budget: $10 – $30 USD

Hello,
I migrated from MySQL 5.7 in my server to MariaDB 10.3, the process damaged (corrupted) several DBs but the most important is the mysql database ( https://mariadb.com/kb/en/the-mysql-database-tables/ ) has half of the table corrupts, so now I can't give priviledges for MySQL users serverwide.

I need to repair this database please.