I too had trouble removing Norton and finally, Symantec sent me what they unofficially called their super-duper uninstaller. And indeed it did work as advertised. It was just a scrip of some sort as I recall.

In any event, should you need it, I am happy to send it to you. But as it's a few years old, it warrants use with caution...and a backup



Harv
27" i7 iMac (10.13.6), iPhone Xs Max (12.1)

Those who can make you believe absurdities can make you commit atrocities. ~Voltaire