Welcome to the forum.
That's a lousy Ethernet adapter you've got there. Maybe that's why Nvidia isn't a big player in the networking sector.
Try this:
Edit: Disregard the first command below, (use second command).
sudo modprobe -r forcedeth; sudo modprobe forcedeth msi=0 msix=0 && sudo systemctl restart NetworkManager
Then run:
echo "options forcedeth msi=0 msix=0" | sudo tee /etc/modprobe.d/forcedeth.conf
Then reboot.