MYSQLのrootユーザーを削除した場合の起動について

現在、以下のMYSQLを利用しています。
Ver 14.14 Distrib 5.7.25, for Linux (x86_64) using EditLine wrapper

誤ってrootユーザーを削除してしまいました。
そのため、セーフモードを以下のコマンドでセットしました。
systemctl set-environment MYSQLD_OPTS="--skip-grant-tables"

その後、起動を試みますが、以下のエラーで起動できません。
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.

root削除した場合は復旧はできないのでしょうか？
SELINUXはdisableです。
また、セーフモードを設定しないと起動するのですが、root以外のユーザーでログインできません。

＜systemctl status mysqld.service　の内容＞

mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: deactivating (final-sigterm) (Result: exit-code) since Sat 2021-07-17 20:26:12 JST; 1min 57s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 29552 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=1/FAILURE)
Process: 29530 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)

Main PID: 26602 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/mysqld.service
`-29555 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid --skip-grant-tables

Jul 17 20:28:07 systemd[1]: Starting MySQL Server...
Jul 17 20:28:09 mysqld[29552]: Initialization of mysqld failed: 0
Jul 17 20:28:09 systemd[1]: mysqld.service: control process exited, code=exited status=1

＜journalctl -xe　の内容＞
Jul 17 20:31:09 polkitd[2977]: Registered Authentication Agent for unix-process:31877:3958708572 (system bu
Jul 17 20:31:09 systemd[1]: Starting MySQL Server...
-- Subject: Unit mysqld.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

-- Unit mysqld.service has begun starting up.
Jul 17 20:31:10 mysqld[31905]: Initialization of mysqld failed: 0
Jul 17 20:31:10 systemd[1]: mysqld.service: control process exited, code=exited status=1
Jul 17 20:31:12 systemd[1]: Failed to start MySQL Server.
-- Subject: Unit mysqld.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

-- Unit mysqld.service has failed.

-- The result is failed.
Jul 17 20:31:12 systemd[1]: Unit mysqld.service entered failed state.
Jul 17 20:31:12 systemd[1]: mysqld.service failed.
Jul 17 20:31:12 polkitd[2977]: Unregistered Authentication Agent for unix-process:31877:3958708572 (system
Jul 17 20:31:12 systemd[1]: mysqld.service holdoff time over, scheduling restart.
Jul 17 20:31:12 systemd[1]: Stopped MySQL Server.
-- Subject: Unit mysqld.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

-- Unit mysqld.service has finished shutting down.
Jul 17 20:31:12 systemd[1]: Starting MySQL Server...
-- Subject: Unit mysqld.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

-- Unit mysqld.service has begun starting up.
Jul 17 20:31:14 mysqld[31963]: Initialization of mysqld failed: 0
Jul 17 20:31:14 systemd[1]: mysqld.service: control process exited, code=exited status=1