Catalina and Norton Anti-Virus

I have upgraded to Catalina on a Mac Air 2017 - The result is a whole load of unnecessary frustration and time wasting with Symantec's Norton anti Virus software that no longer loads properly. I have been through Norton's support centre; gone through every privacy and accessibility option with them under system presences and deleted and reinstalled Norton but with the same result.

Judging by internet traffic mine is not an isolated experience in terms of third party apps and software.

Apple get your act together and get this sorted before I decide that Microsoft and PC is my future and not Apple!!!