In a quick word autoblock might have been the one blocking you as you did a lot of loging.
Reinstalla was not necessary, could have set again admin password using manage, should have sync root and admin pass, then set a rsa key using your terminal.
Then trying to log with your new key, what Reetp explain is valid using a linux client, but from windows alternative could be using putty.
Also better to set the key with a passphrase, then use sshagent to type the passphrase only once per session. And as a passphrase you can set something long and easy to remember, instead of girblish you need write an store to reuse
And when all this is workin, disable password login using ssh please