>> Please do take backup all DB Before Deleted
MySQL service & Process Kill
Check MySQL running or not
brew services list

if running then stop by brew services stop mysql_version
in my case brew services stop mysql@5.7
Also another way to check
ps -ax | grep mysql
If found then Stop and kill any MySQL processes
Remove MySQL
brew remove mysql_version
brew cleanup
In My Case
brew remove mysql@5.7
brew cleanup
Remove the Folder & Files & Preferences
Here tried to add all possible path & files, some of them may not found to delete but don’t worry they are safe
sudo rm /usr/local/mysql
sudo rm -rf /usr/local/var/mysql
sudo rm -rf /usr/local/mysql*
sudo rm ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
sudo rm ~/Library/LaunchDaemons/homebrew.mxcl.mysql.plist
sudo rm -rf /usr/local/bin/mysql
sudo rm -rf /usr/local/etc/my.cnf
sudo rm -rf /et/my.cnf
sudo rm -rf /Library/Receipts/mysql*
sudo rm -rf /Library/Receipts/MySQL*
sudo rm -rf /private/var/db/receipts/*mysql*
To Possible Final Check all deleted or not
mysql -V
brew services list #to find mysql running or not
ps -ax | grep mysql #if still found please do restart machine