My apologies. I thought this was an Apple support site staffed by Apple personnel. The Apple domain name and copyright is therefore very confusing and now can appreciate your situation.
"Apple is not here on these forums.Keep in mind we are just other users such as yourself volunteering our own personal time to try to assist people."
This does no however remove Apple from a providing valid response. It is still unacceptable.
Finally I did a thorough clean and install of Catalina and did not load any applications (no restore from Time Machine)
The Bitdefender remnant is a relic. In your research you should come across various Apple databases contain archaic references to long deleted application. The "Disabled Softerware" listing in System Preferences is a perfect example. Trust me there was no Bitdender application, plist or kext. I reviewed the drive outside MacOS.
Next, yes I reviewed kernel panic logs but they caught 5% of the crashes. And when they did occur (iClould and Sportlight were common agents) they were corrected. Again the only information related to the state of computer prior to and during the crash were in the system logs. And this were we have problem; by your own admission we can not dissect the incident that caused the abend. Apple has gone to lengths to obscure the problems. Again unacceptable. However, why are Apple users with apparently serious issues posting logs that can not be acted on. EtreReport is obviously acceptable for high level analysis but, and in my case, useless; and from what I read the same for other users. Post the report and silence. As I said, those of us who spent time with operating systems and kernels are simply looking for what service threw the exception.
Again, I fully respect and appreciate your position and suspect that you are left to your own devices by Apple. This is not first level support and many Apple users are extremely frustrated. It is import that other readers see this.
Finally I did a thorough clean and install of Catalina and did not load any applications (no restore from Time Machine)