@Slowsaz is there any mysql forum where I can ask the question?
I don’t know but you just have to do what I wrote and it works. You missed something because it works for me on different Arch/Manjaro systems (and an other person followed this steps on other topic and it worked).
You just deleted ALL, it’s different from you original post … You removed all libraries etc etc
To uninstall Ubuntu MariaDB, just run the command: sudo apt -y purge mariadb-server mariadb-client. Then clean the system of packages that were installed automatically: sudo apt -y autoremove.