NetGear A6100 AC600 wireless adapter not working in Ubuntu 20.04. Worked fine in 18.04. Not same problem as previously
This circa-2014 driver doesn't operate correctly as we see in your various pastes. Let's remove it and try a better driver:
sudo dkms remove rtl8812au/4.3.8.12175.20140902+dfsg --all
git clone https://github.com/aircrack-ng/rtl8812au.git
cd rtl8812au
sudo make dkms_install
sudo modprobe 88XXau
Your wireless should now be working.